Hi guys. I just repaired the Z fuse of my m187. The led turned blue but the scooter isn’t turning on. I tried the battery to a friends m365 and the battery works. Any suggestings what to check-fix on my m187? Ps: when I am trying to power up the scooter the led blinks some times but the scooter remains off.
hopefully someone else can help you with that, i have never had to repair the fuse. i do know there is a reset button on the bms, but im sure you tried that already
bms already reseted many times. The battery seems to run ok to another scooter but not mine :( so there something else happening with the scooter not with the battery. any ideas to check something else ?
What I've learned from this and some other general battery videos is that assembling these packs is a crazy process that's just about Stone Age! Here we are in 2017 and we're still dealing with spot welds and solder? There has to be a better way than that. One question I have: If you had replaced those three batteries with the others, could that have upset the BMS since the batteries were of different specs? I wonder about that now because people might want to replace cheap Chinese batteries in low-end eScooters with better ones but I wonder how the BMS software would handle that.
I think it has more to do with quality control than spots weld and solder. most cars today are held together by spot welds. i thought it may upset the BMS, just as the one disconnected battery had affected the scooter. but i was thinking as long as the battery i was putting in was superior to the other batteries, then the new battery would act as if were the old ones. i would be cirous to see how the BMS would handle the batteries if i made a complete battery set of the 3000mah cells. Ill consider that when i somehow destroy this battery pack
Point taken about cars, except for cars it's now done all robotically. Those battery packs in China are all being done by hand and lack the QC robotic assembly has. I'm thinking the BMS software is programmed for certain voltage (or whatever, I have no electrical education) amounts and might get either confused by something different or waste the full capacity of the batteries by not charging them to their new and higher limit.
Congratulations! Great work! Your videos inspire me to learn how to work on my own scooter battery! Thank you for sharing all that you are learning about repairing your own scooter 🛴
Thanks for the tips for the battery, i will check my pack number 2. And i have a tips to repair your back cover. I changed the screw by longer one. It work's great ! Try 20mm screws and add some rings.
Great vid and very educational. I was wondering tho3, without using a multimeter, how will you know which cell is which? Lets say how to tell which bunch off batteries is cell 1, 2, 3, and so forth?
The cell groups start from the side with the bms. You need a multi meter to determine which cell within the cell group is faulty however. Multimeters are extremely cheap so rather than play around in the dark, get one and do it the easy way.
Great video, thanks! I'm also experiencing some weird voltage readings from the different cells. My range however is still ok-ish after 1600km. Yesterday I let my battery run completely flat. At 5% battery left, it didn't have enough power anymore to push me forward so I put it on a chair and let it run free until the battery was completely depleted. At that point cell 10 was at 2.746 volt, which is a difference of 0.5 volt with the highest cell. After charging it overnight cell 10 now sits at 4.124 and the other cells are around 4.154. Could this be because of a bad connection or perhaps a faulty battery of just normal wear and tear after a lot of (ab)use?
Did u fix the problem, my cell 10 sits around 3.2 while rest 9 is around 3.7... and even recharging over night wont get any higher then 3.5 v while others goes to 4.1 v... ill check all connections are fine and even all cells on multimetar showing good voltage. What could be a problem
I got one of these batteries from a friend it wouldn't output anything till I pressed that button on the bms does the led always stay on it wont turn off
I have a similar problems with c03. Performance dropped by 50% I did soldering on those 3 batteries on both sides but somehow this cell is charging to quickly and discharging so quicky to others. When charging is full this cell has 4.19 and all the rest at around 4.01. Could it be a dead battery in that parallel cell?
Hi Dough, I wanted to know if its possible to brake the batteries to individual cells without cutting every cell out of the plastic. I understand i will have to rip of the spot welds but looking at the plastic shell i believe there must be some mechanism to held in place the cage on each side? Would you know how to? What else would you suggest while doing so?
the black plastic shell is made from two pieces and held together by screws. but not sure why you would want to break the battery apart unless you are trying to replace an individual cell
ahh. i dont travel much but i read that the max battery size for carry on is 100 watt hours. the m365 battery is 280 Wh, so you will need to break it down to 3 pieces. seems like too much work. have you considered a electric skateboard?. meepoboard sells replaceable 99Wh batteries for their boards
yes, but only on salted roads and as cold as -4 deg C. no snow or ice. scooter survived the salt conditions without issue. although there was a bunch of frost building up on my jacket, lol. the screws on the bottom of the scooter are stainless steel, so no rust!
Hello, my cell voltages are a litte strange(fully charged): C01: 4,098v C02: 4,144v C03: 4,146v C04: 4,148v C05: 4,145v C06: 4,154v C07: 4,153v C08: 4,155v C09: 4,153v C10: 4,152v Do I have a Problem? I was looking for loose connections on the battery, but couldn't find anything. The batteries within the cells also have the same voltage.
mine is worse (about 0.1v difference from lowest and highest), but that's after riding for about 1200km. there isn't anything to worry about, just normal wear and tear
Hi Thank you for your video. I was wondering if you can do me a small favor. Im planning to buy this scooter and i need to measure the length of the scooter without the front and back wheels. I need to have the right case before i get it and since its 108cm long with the wheels its too long for transport as is. I will need to take the wheels off and try to fit it. Could you please tape measure end to end rear fork end to front fork end? Thanks very much. I would be very appreciative
Got it. The scooter is not meant for off-road riding but rather for walking on pavements like a pavement with minor imperfections. We can say that if you had solid tires, the battery soldering would even go off on a sidewalk with small imperfections. Which is not the case with this scooter. Am I right?
Hello guys, I crossed the 1100 km line in the m365, I solded 2 contacts because the scooter wasn´t powering on. Now with full charge the kms that I can do dropped from 25 to 12, average. I see that all the battery packs are showing 4.11v but battery pack 2, 4,18v. Any ideas why the km´s dropped? Maybe the battery has reached its life expectancy?, Do you guys know where I can buy one? ideally latest version with not those soldering issues.
i would take the battery out and measure every individual cell at the battery contacts points and not the nickel plates, making sure they are nearly equal. if one or more cells are not equal, check the nickel plates and see if they have come off the battery contacts points. congrats on crossing the 1000 km mark! im at ~700km and still get over 20km per charge
Thanks for the quick response bud, I appreciate that. Tomorrow I´ll strip the battery and check those cells that you mentioned, the issue seems to be focused at pack 2 also, so I´ll investigate if I´m experiencing the same issue. I swapped the rear tire for a tubeless solid tire recently and I guess this has caused more vibrations when riding, therefore this unsoldering issues appeared, it is a rough guess but I believe makes sense. I know they released a new version of the scooter with reinforced welding on those contacts at the battery. I just checked that a new battery costs about 250 euros, I don´t know if it is worth buying or maybe going for a newer version of the scooter is better., just 100 euros difference. Thanks again, greetings from Barcelona!
+Nicolás Carrión +Nicolás Carrión vibrations overs time will cause things to break. I have seen the updated battery in a diffrent video. But it looks like all they did was solder a few joints instead of spot welding. So we could easily do the same thing. I would see if you could fix your battery first before deciding to buy an updated one. 250 euros seems kinda pricey for a new battery but we dont really have a choice unless you are in russia. I would go for a whole new scooter just to have spare parts.
Hi Doug - yes I think vibrations are the enemy of the battery and the PMB on this model - you might be interested to check out a video I did on this ruclips.net/video/pmytgJVYMSI/видео.html where I managed to source a much stronger and less flexible underscooter protection plate which also has cushioning strips to support the battery. Hopefully this might help. Not sure that it will be easy to source these strong protection plates in all countries but as a start it might be an idea to add in the protection strips which are very easy to find. Enjoyed your videos!
i have seen the mini/ferry videos on all his mods, too bad they aren't really accessible to anyone outside of russia. ill will add some support foam to the bottom side of the battery or on protection plate the next time i take it off. thanks!
Thanks! no, i dislike the sold tire. it rides rougher, wears quickly and locks up easily when braking, causing flat spots on the tire which i then can feel when riding. some other users are also reporting that the get less range with the solid tire. CST now makes a new tire with a thicker tread area to resist objects piercing the tire
Doug, glad you figured it out. Has the energy recovery mode issue been resolved with the latest firmware? What level would you suggest leaving it on? Weak, medium, or strong? And have you noticed a difference with each mode?
+Vance Pon yes the energy recovery problem has been resolved with the latest update. I do caution you when regenerating on a fully charged battery, because it will cut the regenerating braking to prevent overcharging the battery. This wont be a problem once you have used up a bit of the battery first. I still leave it on weak because it freewheels the easiest when in weak mode vs med or strong.
Doug, you mention that you rode the scooter in rain. Recently I read on a German forum that the ball bearings on the tires are not sealed, hence the scooter should not be exposed to rain. Can you comment on this?
Malte Persike I have ridden twice in the rain so far and i will continue to do so until somthing breaks. Bearings are easy to get and replace with the right tools. I dont know fot sure what type of bearings are in this scooter, but i'd imagine that they should at least have a dust seal on them and not be a fully open bearing. If my bearings ever start to show excessive resistance or noise i will make a video on replacing them.
I think when xiaomi said this scooter is waterproof, they meant that it should not be ridden in puddles deeper that 5cm or about 2inches. So no dropping the scooter in the ocean or trying to scoot across a river.
it is possible, but you will need to find batteries that are identical or better(better capacity and constant amp draw) than the original. and it can be pretty tricky trying to disassemble a welded on pack with out shorting or damaging anything
Similar Batteries , I think we can find some .. On your video, you seems have buy them, but you did not replace old (may be , you will one day ?) ... Yes , I think it's will be difficult to disassemble without damage .. If someone have done that , and take a youtube video or photos, thank for the link !
the pink batteries in my video are samsung 30Q batteries. and one day i might use them, but not yet. if i do change a single battery cell i will make a video on it
Doug Hnut But if I say, replace all the batteries with the samsung ones, would that mean an increase in range and if using the no speed limit firmware; speed? Or are there extra necessary steps needed?
Yes I think that it will be better (not the speed, but we can make more kms) ... But I think is not easy to replace cells (one , 3 ou all) , without destroy the electric connections ,and also the temperature captor , and the cells carter ... it's why I want to see someone who have done that. ... Me, I have to do that, I have 3 wrong cells battery (allways less ou more than the other) . this 3 cells stop charging before normal , and stop my m365 berore doing 10km)
What are you using? I use ninebot, and it does not provide detailed voltages. I ran it a weird, but probably similar problem: The battery charges, but the acceleration seems significantly slower than before, and it almost never crosses 13 mph, whereas before, it consistently went 15-16 mph. I suspect one solder came loose, as I hit the bottom on my way back home on a pothole.
i use the "mi home" app for android device. i believe the "mi home" app for apple devices will not show the detailed voltages. i hope you can fix it soon!
Doug Hnut I really hope I can fix it. I really got used to the 15 mph and fast acceleration. This is no fun riding. Any suggestions? I see the battery charges all the way to stated 7800 mAh in app. My suspicion is the motor, as it just feels like not really do what it is supposed to.
mine would also show 7800mAH fully charged with the battery problem, but i didn't have the issue of reaching max speed 25 kph/15 mph. this may be a dumb question, but is the scooter in "eco" mode? and also, is you tire pressure good? i run mine at 60 psi and it feels better. another thing to note is that if it is really cold out, the batteries cannot pump out as much amps as it can when it can at room temperature
Doug Hnut you are a lifesaver and I'm an idiot. Somehow I totally have forgotten about the Eco mode, since I never used it after the very first ride. Last time I was at work, my co-workers took the liberty of trying the scooter and since they had no idea what they were doing, they must have turned it on by accident. Again, thanks so much, it's too cold outside now but I tried it inside and pretty sure order is restored to the universe. PS: have you seen the 3D fix people came up with for the wobbly vertical bar? www.thingiverse.com/thing:2551419 I just ordered it for print. Will report if it makes any better.
+Piacerte Almeida the battery pack is bolted to the bottom of the main chassis. And it is supported by a flexiable plastic bottom plate. So i think under very bumpy conditions, the battery cells shift a tiny bit. Over time this shifting will cause the battery terminal joints to break. The next time i take the bottom cover off, i will add an addition thin piece of foam to better support the battery and reduce movement.
Do you charge your scooter until the tailight blinks or until it stops lighting up? I stop charging when the taillight starts to blink. I notice that this starts to happen when it hits 41.36 volts. I think it stops lighting up at 41.55 total volts, but you need to have it plugged in much longer for that to happen. And why does the taillight start to blink at 41.36 volts?
i usually leave it on while it charges. i haven't confirmed this, but i've heard that leaving it switched on while charging will balance charge the batteries, and that this happens when the taillight starts to flash at the end of the charge cycle
As soon as I start charging, I always turn it on to see how much charge the battery has through the app. But once it's on and it's charging, I don't think you can turn it off even if you wanted to
Thanks for the reply and I guess the makes sense when it's switched on it's going to potentially have more control over the charging. I've just turned my scooter on while it's charging and the rear brake light is flashing very slowly (the battery is quite low), you mention it flashes at the end of the cycle, does your flash at the start of the cycle as well? Thanks
Hi, I'll apologise in advance for the naivety of my question but I'm not electronically minded whatsoever. I have an M365 which is around 4 weeks old, but I've already noticed a reduction in overall performance. I'd estimate it's around 25% less efficient over the same distance as it was when I originally purchased the scooter. There has also been a noticeable decline in speed. I wouldn't attempt to emulate your diagnostic skills as it exceeds my intellectual capacity and I don't want to end up breaking it. But I did notice a 60v replacement battery available for the Xiaomi and was wondering if this would be a simple 'Plug & play' fix or would the ESC get damaged or destroyed? Also (and please excuse my ignorance) there are 24x3.7V cells but the system is 37 volts? How does that calculate, as the from my uneducated perspective, the accumulative voltage of the cells far exceeds 37v. Or have I got this totally wrong? Sorry for all the questions but electronics is like trying to understand quantum physics for me.
correct me if im wrong but i think the 60v battery is only available in Russia. and in order to run the 60v battery you will need a lot work done to get it to work. such as a aftermarket speed controller and custom wiring. i think you are best off getting some one else to repair the battery, or just buy a new one. there are actually 30 cells. in a 10s3p configuration. 10 cells in SERIES at 3.7v per cell equals 37 volts. easy right? now take 3 of these 10 cell 37volt cell packs and wire them in PARALLEL and you will end up with a 37 volt battery pack that has 3 times the capacity of just one 10 cell pack
Hi, Thank you for responding and taking the time to answer my question regarding voltage. Unfortunately I'm unable to find the link that advertised the 60v battery that I previously mentioned. But I'm almost certain it was available for worldwide shipping and not exclusive to Russia. I came across another company (I think it might be in French) that appears to be selling the same battery. And it does seem to be shipping overseas. (Link below). Thanks again for your help. fr.aliexpress.com/store/product/Xiaomi-Electric-Scooter-Battery-Replacement-60V-12Ah-Lithium-Ion-Battery-Pack-Deep-Cycle-With-BMS-Charger/1761558_32817886178.html?spm=a2g0w.12010612.0.0.29533d3eLxHiab
no problem! now that battery you linked, the dimension will not fit inside the m365 battery housing. it says it is 70mm tall. the m365 battery is about 40mm tall. and not a lot of room to play with. also none of the connectors match the m365 battery connectors. www.dochello.ru/english this is where all the cool stuff for the m365 comes from, including the 60v battery. they actually do ship to USA but max 1000 gram parcel. battery for sure is gonna weight more than that
Thank you for clarifying the battery issue. It's easy for naïve people to get tricked into buying these things if they're unaware of the housing requirements and imitations that you've kindly explained. They shouldn't be advertising it as a M365 replacement when it doesn't fit, particularly when the financial outlay is a considerable commitment for a battery. I tried the link you provided but unfortunately I can't seem to access it. I've ran into another issue today - rear puncture. The repair has been done, but getting the tyre back on is proving to be an almost impossible task. These things are great until they start going wrong. Thanks again.
try googling "doc hello" should be the first link. as for trying to get the tire back on, it might help to use bicycle tire levers. there's lots of videos showing how to use them.
Did the addition of thin piece foam work? You've done this for how long? Then this problem is common because of the lack of absorption of impact in the base of the battery, which is caused by the shaking. Am I right? Maybe it's a flaw in the scooter design. Thank you.
+Piacerte Almeida i haven't added the foam yet but have other commenters suggest that to be done. Yes you are correct about the lack of abosorbtion from impact. I wouldnt say that it is a flaw in the design. i'd say that it is not designed for this type of abuse. Both times i had battery terminal issues was right after i took the scooter off roading. This scooter was defintly not designed for that type of riding. If it was, i'd expect to see some sort of suspension. The penumatic tires can only compensate for minor imperfections in the road and the occasional drop off a curb.
Hi guys, I just got my M365 scooter and been riding it for a week now. Quick question, does anyone here know if it's optimal to charge it after every ride, or should I wait until the battery goes to at least below 50% before charging? Does this even matter? Is there such a thing as a maximum number of total charges within the batteries? REPLY
This is a good question. The qualities of a Lion battery mean that it both does not like to be drained too low and it does not like to be stored for long periods above 70%. I think it is a good idea to let it go below 50 before charging but don't let it drain completely. Store at around 70% then top up to 100 just before (say night before) you need to use it - that seems the best advice out there.
Please can? you tell me (maybe in the future you will need to know) ' The measurement of the 3 wires from the BMC battery board to the electronic regulator (white yellow and green wires) voltage and resistance... Why? we shoukd to know these values? because in my case, after fixing so many times battery connectors by welding, finally a red led appears and dont know how to fix I checked fuses, contactcs, NTC ecc and in fact we olny need to aply 10S ion battery to the regulator and the right signal from these 3 wires , Another problem will be how to charge and discharge the battery but it is not a problem for me I need some one tell to me these values and maybe will be helpful for other people Sorry my english!!!!
Doug hnut Hello Sir, here's some info on my pack from the m365 battery android app. Do you think the voltage on cell 6 is ok despite being noticeably lower than the others or do I need to get in there and fix it? Remaining percentage: 100 % Battery level: 7846 mAh Design capacity: 7800 mAh Battery voltage: 41.48 V Temp. (bottom sensor): 23°C Temp. (top sensor): 23°C Full cycles: 1 Charge count: 19 Production date: 17-10-28 Battery S/N: 3JCGJ17....... BMS version: 1.1.5 C01: 4.163 V C02: 4.121 V C03: 4.157 V C04: 4.161 V C05: 4.163 V C06: 4.112 V C07: 4.163 V C08: 4.143 V C09: 4.163 V C10: 4.146 V
Hello, I have big problem. I just received my M365, did one test round and everything during the test ride was fine. When I connect M365 to MiHome, it shows me that firmware update 1.3.4 is available. I accept new firmware. During updating firmware (around 30% progress) the update process failed. It shows in the MiHome app that bluetooth connection to M365 was lost and from that point is M365 freezed. Three leds on the handlebar are stil on. I cant turn of the M365. I cant do anything with M365. As I wrote before just three leds are on and I cant turn them off in any way. MiHome app cant connect to M365 anymore, still trying to connect, but when 60% progress of trying to connect it fails to connect to M365. I think that mainboard get stucked during firmware update and is broken now. How can I reset mainboard? What if I remove powersupply from mainboard. Can i damage mainboard in this way when firmware upgrade was not finished well? Please help me. Thank you
beng guds there is a way to solve it and you need another app for android to do some downgrades. Also heard that the phone needs to be connected with China to get the update in the right way.
hi doug, i think like my scooter is really weaker when it hits less then 50% of battery, i can ussaly get 25km/h on flat street but going up to a little hill is really harder then some time ago. I chceked the battery packs voltage and they are all 3,55 and above. I noticed the problem since i am using solid tire on front wheel, but i dont understand how could this affect the performance. Have you noticed problem like this or do you have any ideas what could help? thanks !
+Domink Knechta i have had other people that use the solid tire in the front, and they have told me that thier max speed, traction and battery range isnt as good when using penumatic tires. I personally ony used the soild tire in the rear and i really dont like it. Ride is rougher and the tires lock up much easier creating flat spots.
Looks like this will charge as well as discharge these individual battery cells, yes? www.amazon.com/Keenstone-Battery-Charger-Discharger-Voltage/dp/B072V7PNJV/ref=cm_cr_arp_d_product_top?ie=UTF8
www.ebay.com/itm/US-EU-Battery-Charger-For-18650-16340-Battery-Free-Shipping/192295006877?hash=item2cc5acf29d:g:-WEAAOSwiYFXGheq i used this charger. and solder wires to alligator clips. any lipo or liion charger should also work
Thanks. I just ordered similar charger as well as soldering kit which I should receive within 5 days. On a side note, below are my cell pack readings. Charged(Next Day): #1 4.16v #2 4.07v #3-#10 4.12v-4.13v Ridden: #1 3.44v #2 4.07v #3-#10 3.80v I haven't opened up the battery pack yet but I suspect the exact same problem as you. Even cell pack #2 being the culprit. I wonder if Xiaomi mass produced the battery pack with this problem. Did you happen to buy your scooter around Sept 2017?
No, sealed lead acid batterys are big and heavy. Like car batterys. These are lithion ion. Exact chemistry might be ICR or maybe INR. Either way, these are much better then SLAcid batterys
He used 3000mah cells it worked, can someone tell me if it work if I use more mah like: 3500mAh (Panasonic NCR 18650 GA 3.7V 10A) or 3200mAh (Panasonic NCR 18650 BD 3.7V 10A) (On my Xiaomi M365 NOTpro)? Will it work? Is more mah = better?
These are not that great of batteries to use on older scooters. I have an original Schwinn S500 & the thing runs on 24V 10Ah. You can bump the power to 36V & it fun going 30mph but can be dangerous. So I modded the scooter added this battery only for the BMS maybe the cells to fight me. These high powered batteries drop the voltage so low when I go full throttle it would turn off on me then turn back on after a second or two. But if I maintain a steady speed from 1/4 to 3/4 it works flawless unless you come to a complete stop. You’ll have to kick off and twist the throttle slowly to get going again at high speed.
dude... you're way too dependent on this scooter. it's not meant to ride in rough terrain like the one that's in the previous video. This is like a toy which does not replace my car when i need a ride to work
omg I was totally trolling, thanks for the video tutorial though haha, have you seen the ones where you have to cute the GEL with UV light ? I' was told those were the only good ones, they're about 16$ on aliexpress
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
Hi guys. I just repaired the Z fuse of my m187. The led turned blue but the scooter isn’t turning on. I tried the battery to a friends m365 and the battery works. Any suggestings what to check-fix on my m187?
Ps: when I am trying to power up the scooter the led blinks some times but the scooter remains off.
hopefully someone else can help you with that, i have never had to repair the fuse. i do know there is a reset button on the bms, but im sure you tried that already
bms already reseted many times. The battery seems to run ok to another scooter but not mine :( so there something else happening with the scooter not with the battery. any ideas to check something else ?
nothing i can think of. sound like its an issue with the controller.
Did you find any solution for this issue?
@@teodormonev7567 I had some similar problem and the solution was to replace the motherboard
What I've learned from this and some other general battery videos is that assembling these packs is a crazy process that's just about Stone Age! Here we are in 2017 and we're still dealing with spot welds and solder? There has to be a better way than that.
One question I have: If you had replaced those three batteries with the others, could that have upset the BMS since the batteries were of different specs? I wonder about that now because people might want to replace cheap Chinese batteries in low-end eScooters with better ones but I wonder how the BMS software would handle that.
I think it has more to do with quality control than spots weld and solder. most cars today are held together by spot welds.
i thought it may upset the BMS, just as the one disconnected battery had affected the scooter. but i was thinking as long as the battery i was putting in was superior to the other batteries, then the new battery would act as if were the old ones. i would be cirous to see how the BMS would handle the batteries if i made a complete battery set of the 3000mah cells. Ill consider that when i somehow destroy this battery pack
Point taken about cars, except for cars it's now done all robotically. Those battery packs in China are all being done by hand and lack the QC robotic assembly has.
I'm thinking the BMS software is programmed for certain voltage (or whatever, I have no electrical education) amounts and might get either confused by something different or waste the full capacity of the batteries by not charging them to their new and higher limit.
its 2021 and im dealing with these issues right now 😅
Congratulations! Great work! Your videos inspire me to learn how to work on my own scooter battery! Thank you for sharing all that you are learning about repairing your own scooter 🛴
Would bad cells cause a pulsing motor at high speeds?
Thanks for the tips for the battery, i will check my pack number 2. And i have a tips to repair your back cover. I changed the screw by longer one. It work's great ! Try 20mm screws and add some rings.
my BMS no led lit when balancer connector connected. also found heating on other side where sw1 mounted? any recommendationz?
Great vid and very educational. I was wondering tho3, without using a multimeter, how will you know which cell is which? Lets say how to tell which bunch off batteries is cell 1, 2, 3, and so forth?
The cell groups start from the side with the bms. You need a multi meter to determine which cell within the cell group is faulty however. Multimeters are extremely cheap so rather than play around in the dark, get one and do it the easy way.
Thank you for guiding me. Appreciate the help
Can you replace them all? For more power and capacity?
Great video, thanks! I'm also experiencing some weird voltage readings from the different cells. My range however is still ok-ish after 1600km. Yesterday I let my battery run completely flat. At 5% battery left, it didn't have enough power anymore to push me forward so I put it on a chair and let it run free until the battery was completely depleted. At that point cell 10 was at 2.746 volt, which is a difference of 0.5 volt with the highest cell. After charging it overnight cell 10 now sits at 4.124 and the other cells are around 4.154. Could this be because of a bad connection or perhaps a faulty battery of just normal wear and tear after a lot of (ab)use?
Did u fix the problem, my cell 10 sits around 3.2 while rest 9 is around 3.7... and even recharging over night wont get any higher then 3.5 v while others goes to 4.1 v... ill check all connections are fine and even all cells on multimetar showing good voltage. What could be a problem
Some problem, do you fix it ?
I got one of these batteries from a friend it wouldn't output anything till I pressed that button on the bms does the led always stay on it wont turn off
Hello, any idea where I can solder my rear light?
It's exactly the same issue I have. Even same battery cell pack 2. I'm going to follow your suggestion. Thanks bro
Dima B. How did it go?
If you replace battery it's not a good idea to mix it (even if they are better ones) Replace them all or use the same kind!
I have a similar problems with c03. Performance dropped by 50% I did soldering on those 3 batteries on both sides but somehow this cell is charging to quickly and discharging so quicky to others. When charging is full this cell has 4.19 and all the rest at around 4.01. Could it be a dead battery in that parallel cell?
Hi Dough, I wanted to know if its possible to brake the batteries to individual cells without cutting every cell out of the plastic. I understand i will have to rip of the spot welds but looking at the plastic shell i believe there must be some mechanism to held in place the cage on each side? Would you know how to? What else would you suggest while doing so?
the black plastic shell is made from two pieces and held together by screws. but not sure why you would want to break the battery apart unless you are trying to replace an individual cell
Doug Hnut travelling is the reason. The pack is too big for an aircraft it its ok if you carry small pieces
ahh. i dont travel much but i read that the max battery size for carry on is 100 watt hours. the m365 battery is 280 Wh, so you will need to break it down to 3 pieces. seems like too much work. have you considered a electric skateboard?. meepoboard sells replaceable 99Wh batteries for their boards
What does solid blue light on the battery mean?
Great videos by the way . Doug Hnut have you ridden it in the winter? if so can you comment ?
thank you.
yes, but only on salted roads and as cold as -4 deg C. no snow or ice.
scooter survived the salt conditions without issue. although there was a bunch of frost building up on my jacket, lol.
the screws on the bottom of the scooter are stainless steel, so no rust!
Hello,
my cell voltages are a litte strange(fully charged):
C01: 4,098v
C02: 4,144v
C03: 4,146v
C04: 4,148v
C05: 4,145v
C06: 4,154v
C07: 4,153v
C08: 4,155v
C09: 4,153v
C10: 4,152v
Do I have a Problem?
I was looking for loose connections on the battery, but couldn't find anything.
The batteries within the cells also have the same voltage.
mine is worse (about 0.1v difference from lowest and highest), but that's after riding for about 1200km. there isn't anything to worry about, just normal wear and tear
Hi Thank you for your video. I was wondering if you can do me a small favor. Im planning to buy this scooter and i need to measure the length of the scooter without the front and back wheels. I need to have the right case before i get it and since its 108cm long with the wheels its too long for transport as is. I will need to take the wheels off and try to fit it. Could you please tape measure end to end rear fork end to front fork end? Thanks very much. I would be very appreciative
Great work mate. Thanks for the video!
Wow nice video Sir!
i love those 18650's 😍
Got it. The scooter is not meant for off-road riding but rather for walking on pavements like a pavement with minor imperfections. We can say that if you had solid tires, the battery soldering would even go off on a sidewalk with small imperfections. Which is not the case with this scooter. Am I right?
the battery should survive with solid tires on this scooter under normal riding conditions
hi ! sorry for stupid question but how did you charge separately the 3 cells ?
Angel Graur I wonder too
Yes can you please clarify
where do you source the batteries from
Hello guys, I crossed the 1100 km line in the m365, I solded 2 contacts because the scooter wasn´t powering on. Now with full charge the kms that I can do dropped from 25 to 12, average. I see that all the battery packs are showing 4.11v but battery pack 2, 4,18v. Any ideas why the km´s dropped? Maybe the battery has reached its life expectancy?, Do you guys know where I can buy one? ideally latest version with not those soldering issues.
i would take the battery out and measure every individual cell at the battery contacts points and not the nickel plates, making sure they are nearly equal. if one or more cells are not equal, check the nickel plates and see if they have come off the battery contacts points.
congrats on crossing the 1000 km mark! im at ~700km and still get over 20km per charge
Thanks for the quick response bud, I appreciate that. Tomorrow I´ll strip the battery and check those cells that you mentioned, the issue seems to be focused at pack 2 also, so I´ll investigate if I´m experiencing the same issue. I swapped the rear tire for a tubeless solid tire recently and I guess this has caused more vibrations when riding, therefore this unsoldering issues appeared, it is a rough guess but I believe makes sense. I know they released a new version of the scooter with reinforced welding on those contacts at the battery. I just checked that a new battery costs about 250 euros, I don´t know if it is worth buying or maybe going for a newer version of the scooter is better., just 100 euros difference. Thanks again, greetings from Barcelona!
+Nicolás Carrión +Nicolás Carrión vibrations overs time will cause things to break. I have seen the updated battery in a diffrent video. But it looks like all they did was solder a few joints instead of spot welding. So we could easily do the same thing. I would see if you could fix your battery first before deciding to buy an updated one. 250 euros seems kinda pricey for a new battery but we dont really have a choice unless you are in russia. I would go for a whole new scooter just to have spare parts.
Hi Doug - yes I think vibrations are the enemy of the battery and the PMB on this model - you might be interested to check out a video I did on this ruclips.net/video/pmytgJVYMSI/видео.html where I managed to source a much stronger and less flexible underscooter protection plate which also has cushioning strips to support the battery. Hopefully this might help. Not sure that it will be easy to source these strong protection plates in all countries but as a start it might be an idea to add in the protection strips which are very easy to find. Enjoyed your videos!
i have seen the mini/ferry videos on all his mods, too bad they aren't really accessible to anyone outside of russia. ill will add some support foam to the bottom side of the battery or on protection plate the next time i take it off. thanks!
Thanks for the great work....I subbed, are you still using solid tyre on the back?
Thanks! no, i dislike the sold tire. it rides rougher, wears quickly and locks up easily when braking, causing flat spots on the tire which i then can feel when riding. some other users are also reporting that the get less range with the solid tire. CST now makes a new tire with a thicker tread area to resist objects piercing the tire
Doug, glad you figured it out. Has the energy recovery mode issue been resolved with the latest firmware? What level would you suggest leaving it on? Weak, medium, or strong? And have you noticed a difference with each mode?
+Vance Pon yes the energy recovery problem has been resolved with the latest update. I do caution you when regenerating on a fully charged battery, because it will cut the regenerating braking to prevent overcharging the battery. This wont be a problem once you have used up a bit of the battery first.
I still leave it on weak because it freewheels the easiest when in weak mode vs med or strong.
Thanks for the tip
Doug, you mention that you rode the scooter in rain. Recently I read on a German forum that the ball bearings on the tires are not sealed, hence the scooter should not be exposed to rain. Can you comment on this?
Malte Persike I have ridden twice in the rain so far and i will continue to do so until somthing breaks. Bearings are easy to get and replace with the right tools. I dont know fot sure what type of bearings are in this scooter, but i'd imagine that they should at least have a dust seal on them and not be a fully open bearing. If my bearings ever start to show excessive resistance or noise i will make a video on replacing them.
I think when xiaomi said this scooter is waterproof, they meant that it should not be ridden in puddles deeper that 5cm or about 2inches. So no dropping the scooter in the ocean or trying to scoot across a river.
That makes a lot of sense. After all, the internals are quite exposed due to the cooling vents at the bottom of the board. So, autumn, here we come!
is possible to change some battery cells ? Nobody do that ?
it is possible, but you will need to find batteries that are identical or better(better capacity and constant amp draw) than the original. and it can be pretty tricky trying to disassemble a welded on pack with out shorting or damaging anything
Similar Batteries , I think we can find some .. On your video, you seems have buy them, but you did not replace old (may be , you will one day ?) ... Yes , I think it's will be difficult to disassemble without damage .. If someone have done that , and take a youtube video or photos, thank for the link !
the pink batteries in my video are samsung 30Q batteries. and one day i might use them, but not yet. if i do change a single battery cell i will make a video on it
Doug Hnut But if I say, replace all the batteries with the samsung ones, would that mean an increase in range and if using the no speed limit firmware; speed? Or are there extra necessary steps needed?
Yes I think that it will be better (not the speed, but we can make more kms) ... But I think is not easy to replace cells (one , 3 ou all) , without destroy the electric connections ,and also the temperature captor , and the cells carter ... it's why I want to see someone who have done that. ... Me, I have to do that, I have 3 wrong cells battery (allways less ou more than the other) . this 3 cells stop charging before normal , and stop my m365 berore doing 10km)
What are you using? I use ninebot, and it does not provide detailed voltages. I ran it a weird, but probably similar problem: The battery charges, but the acceleration seems significantly slower than before, and it almost never crosses 13 mph, whereas before, it consistently went 15-16 mph. I suspect one solder came loose, as I hit the bottom on my way back home on a pothole.
i use the "mi home" app for android device. i believe the "mi home" app for apple devices will not show the detailed voltages. i hope you can fix it soon!
Doug Hnut I really hope I can fix it. I really got used to the 15 mph and fast acceleration. This is no fun riding. Any suggestions? I see the battery charges all the way to stated 7800 mAh in app. My suspicion is the motor, as it just feels like not really do what it is supposed to.
mine would also show 7800mAH fully charged with the battery problem, but i didn't have the issue of reaching max speed 25 kph/15 mph. this may be a dumb question, but is the scooter in "eco" mode? and also, is you tire pressure good? i run mine at 60 psi and it feels better. another thing to note is that if it is really cold out, the batteries cannot pump out as much amps as it can when it can at room temperature
Doug Hnut you are a lifesaver and I'm an idiot. Somehow I totally have forgotten about the Eco mode, since I never used it after the very first ride. Last time I was at work, my co-workers took the liberty of trying the scooter and since they had no idea what they were doing, they must have turned it on by accident. Again, thanks so much, it's too cold outside now but I tried it inside and pretty sure order is restored to the universe. PS: have you seen the 3D fix people came up with for the wobbly vertical bar? www.thingiverse.com/thing:2551419
I just ordered it for print. Will report if it makes any better.
Doug Hnut also, tried the Mi Home app, but it fails to install some plugins and does not connect to scooter. Any magical fix for that too? ;)
Is this defect in the battery frequent? Why does the solder break? Thank you.
+Piacerte Almeida the battery pack is bolted to the bottom of the main chassis. And it is supported by a flexiable plastic bottom plate. So i think under very bumpy conditions, the battery cells shift a tiny bit. Over time this shifting will cause the battery terminal joints to break.
The next time i take the bottom cover off, i will add an addition thin piece of foam to better support the battery and reduce movement.
Do you charge your scooter until the tailight blinks or until it stops lighting up? I stop charging when the taillight starts to blink. I notice that this starts to happen when it hits 41.36 volts. I think it stops lighting up at 41.55 total volts, but you need to have it plugged in much longer for that to happen. And why does the taillight start to blink at 41.36 volts?
aragorn318 that's a good question . I usually don't watch it charge. I'll look into this.
Do you guys leave your scooter switched on when charging, is that the recommended way?
i usually leave it on while it charges. i haven't confirmed this, but i've heard that leaving it switched on while charging will balance charge the batteries, and that this happens when the taillight starts to flash at the end of the charge cycle
As soon as I start charging, I always turn it on to see how much charge the battery has through the app. But once it's on and it's charging, I don't think you can turn it off even if you wanted to
Thanks for the reply and I guess the makes sense when it's switched on it's going to potentially have more control over the charging. I've just turned my scooter on while it's charging and the rear brake light is flashing very slowly (the battery is quite low), you mention it flashes at the end of the cycle, does your flash at the start of the cycle as well?
Thanks
Hi,
I'll apologise in advance for the naivety of my question but I'm not electronically minded whatsoever. I have an M365 which is around 4 weeks old, but I've already noticed a reduction in overall performance. I'd estimate it's around 25% less efficient over the same distance as it was when I originally purchased the scooter. There has also been a noticeable decline in speed. I wouldn't attempt to emulate your diagnostic skills as it exceeds my intellectual capacity and I don't want to end up breaking it. But I did notice a 60v replacement battery available for the Xiaomi and was wondering if this would be a simple 'Plug & play' fix or would the ESC get damaged or destroyed? Also (and please excuse my ignorance) there are 24x3.7V cells but the system is 37 volts? How does that calculate, as the from my uneducated perspective, the accumulative voltage of the cells far exceeds 37v. Or have I got this totally wrong? Sorry for all the questions but electronics is like trying to understand quantum physics for me.
correct me if im wrong but i think the 60v battery is only available in Russia. and in order to run the 60v battery you will need a lot work done to get it to work. such as a aftermarket speed controller and custom wiring. i think you are best off getting some one else to repair the battery, or just buy a new one.
there are actually 30 cells. in a 10s3p configuration. 10 cells in SERIES at 3.7v per cell equals 37 volts. easy right? now take 3 of these 10 cell 37volt cell packs and wire them in PARALLEL and you will end up with a 37 volt battery pack that has 3 times the capacity of just one 10 cell pack
Hi,
Thank you for responding and taking the time to answer my question regarding voltage. Unfortunately I'm unable to find the link that advertised the 60v battery that I previously mentioned. But I'm almost certain it was available for worldwide shipping and not exclusive to Russia.
I came across another company (I think it might be in French) that appears to be selling the same battery. And it does seem to be shipping overseas. (Link below). Thanks again for your help.
fr.aliexpress.com/store/product/Xiaomi-Electric-Scooter-Battery-Replacement-60V-12Ah-Lithium-Ion-Battery-Pack-Deep-Cycle-With-BMS-Charger/1761558_32817886178.html?spm=a2g0w.12010612.0.0.29533d3eLxHiab
no problem!
now that battery you linked, the dimension will not fit inside the m365 battery housing. it says it is 70mm tall. the m365 battery is about 40mm tall. and not a lot of room to play with. also none of the connectors match the m365 battery connectors. www.dochello.ru/english this is where all the cool stuff for the m365 comes from, including the 60v battery. they actually do ship to USA but max 1000 gram parcel. battery for sure is gonna weight more than that
Thank you for clarifying the battery issue. It's easy for naïve people to get tricked into buying these things if they're unaware of the housing requirements and imitations that you've kindly explained. They shouldn't be advertising it as a M365 replacement when it doesn't fit, particularly when the financial outlay is a considerable commitment for a battery.
I tried the link you provided but unfortunately I can't seem to access it.
I've ran into another issue today - rear puncture. The repair has been done, but getting the tyre back on is proving to be an almost impossible task. These things are great until they start going wrong. Thanks again.
try googling "doc hello" should be the first link. as for trying to get the tire back on, it might help to use bicycle tire levers. there's lots of videos showing how to use them.
Did the addition of thin piece foam work? You've done this for how long? Then this problem is common because of the lack of absorption of impact in the base of the battery, which is caused by the shaking. Am I right? Maybe it's a flaw in the scooter design. Thank you.
+Piacerte Almeida i haven't added the foam yet but have other commenters suggest that to be done. Yes you are correct about the lack of abosorbtion from impact. I wouldnt say that it is a flaw in the design. i'd say that it is not designed for this type of abuse.
Both times i had battery terminal issues was right after i took the scooter off roading. This scooter was defintly not designed for that type of riding. If it was, i'd expect to see some sort of suspension. The penumatic tires can only compensate for minor imperfections in the road and the occasional drop off a curb.
Hi guys, I just got my M365 scooter and been riding it for a week now. Quick question, does anyone here know if it's optimal to charge it after every ride, or should I wait until the battery goes to at least below 50% before charging? Does this even matter? Is there such a thing as a maximum number of total charges within the batteries?
REPLY
This is a good question. The qualities of a Lion battery mean that it both does not like to be drained too low and it does not like to be stored for long periods above 70%. I think it is a good idea to let it go below 50 before charging but don't let it drain completely. Store at around 70% then top up to 100 just before (say night before) you need to use it - that seems the best advice out there.
Please can? you tell me (maybe in the future you will need to know) '
The measurement of the 3 wires from the BMC battery board to the electronic regulator (white yellow and green wires) voltage and resistance...
Why? we shoukd to know these values? because in my case, after fixing so many times battery connectors by welding, finally a red led appears and dont know how to fix I checked fuses, contactcs, NTC ecc and in fact we olny need to aply 10S ion battery to the regulator and the right signal from these 3 wires , Another problem will be how to charge and discharge the battery but it is not a problem for me
I need some one tell to me these values and maybe will be helpful for other people
Sorry my english!!!!
Doug hnut Hello Sir, here's some info on my pack from the m365 battery android app. Do you think the voltage on cell 6 is ok despite being noticeably lower than the others or do I need to get in there and fix it?
Remaining percentage: 100 %
Battery level: 7846 mAh
Design capacity: 7800 mAh
Battery voltage: 41.48 V
Temp. (bottom sensor): 23°C
Temp. (top sensor): 23°C
Full cycles: 1
Charge count: 19
Production date: 17-10-28
Battery S/N: 3JCGJ17.......
BMS version: 1.1.5
C01: 4.163 V
C02: 4.121 V
C03: 4.157 V
C04: 4.161 V
C05: 4.163 V
C06: 4.112 V
C07: 4.163 V
C08: 4.143 V
C09: 4.163 V
C10: 4.146 V
The real sign of voltage difference will show at a lower battery level if there was a problem. But so far thoes numbers look good
Hello, I have big problem. I just received my M365, did one test round and everything during the test ride was fine. When I connect M365 to MiHome, it shows me that firmware update 1.3.4 is available. I accept new firmware. During updating firmware (around 30% progress) the update process failed. It shows in the MiHome app that bluetooth connection to M365 was lost and from that point is M365 freezed. Three leds on the handlebar are stil on. I cant turn of the M365. I cant do anything with M365. As I wrote before just three leds are on and I cant turn them off in any way. MiHome app cant connect to M365 anymore, still trying to connect, but when 60% progress of trying to connect it fails to connect to M365. I think that mainboard get stucked during firmware update and is broken now. How can I reset mainboard? What if I remove powersupply from mainboard. Can i damage mainboard in this way when firmware upgrade was not finished well? Please help me. Thank you
beng guds there is a way to solve it and you need another app for android to do some downgrades. Also heard that the phone needs to be connected with China to get the update in the right way.
hi doug, i think like my scooter is really weaker when it hits less then 50% of battery, i can ussaly get 25km/h on flat street but going up to a little hill is really harder then some time ago. I chceked the battery packs voltage and they are all 3,55 and above. I noticed the problem since i am using solid tire on front wheel, but i dont understand how could this affect the performance. Have you noticed problem like this or do you have any ideas what could help? thanks !
+Domink Knechta i have had other people that use the solid tire in the front, and they have told me that thier max speed, traction and battery range isnt as good when using penumatic tires.
I personally ony used the soild tire in the rear and i really dont like it. Ride is rougher and the tires lock up much easier creating flat spots.
+Domink Knechta i have a video review on the solid tires in my playlist. There are some good comments in there too. Check it out. Thanks for watching.
How did you charge just the 3 battery cells?
Looks like this will charge as well as discharge these individual battery cells, yes?
www.amazon.com/Keenstone-Battery-Charger-Discharger-Voltage/dp/B072V7PNJV/ref=cm_cr_arp_d_product_top?ie=UTF8
i used a cheapo 18650 single cell charger with extension leads to charge the 3 cell pack. monitored it with a voltmeter
What brand & model charger? I have the same range problems that you had and my cell pack #1 and #2 batteries need to be equalized
www.ebay.com/itm/US-EU-Battery-Charger-For-18650-16340-Battery-Free-Shipping/192295006877?hash=item2cc5acf29d:g:-WEAAOSwiYFXGheq
i used this charger. and solder wires to alligator clips. any lipo or liion charger should also work
Thanks. I just ordered similar charger as well as soldering kit which I should receive within 5 days. On a side note, below are my cell pack readings.
Charged(Next Day): #1 4.16v #2 4.07v #3-#10 4.12v-4.13v
Ridden: #1 3.44v #2 4.07v #3-#10 3.80v
I haven't opened up the battery pack yet but I suspect the exact same problem as you. Even cell pack #2 being the culprit. I wonder if Xiaomi mass produced the battery pack with this problem. Did you happen to buy your scooter around Sept 2017?
Is the stock battery an SLA battery?
No, sealed lead acid batterys are big and heavy. Like car batterys. These are lithion ion. Exact chemistry might be ICR or maybe INR. Either way, these are much better then SLAcid batterys
Great work! Keep it up!
He used 3000mah cells it worked, can someone tell me if it work if I use more mah like:
3500mAh (Panasonic NCR 18650 GA 3.7V 10A)
or
3200mAh (Panasonic NCR 18650 BD 3.7V 10A)
(On my Xiaomi M365 NOTpro)? Will it work? Is more mah = better?
These are not that great of batteries to use on older scooters. I have an original Schwinn S500 & the thing runs on 24V 10Ah. You can bump the power to 36V & it fun going 30mph but can be dangerous. So I modded the scooter added this battery only for the BMS maybe the cells to fight me. These high powered batteries drop the voltage so low when I go full throttle it would turn off on me then turn back on after a second or two. But if I maintain a steady speed from 1/4 to 3/4 it works flawless unless you come to a complete stop. You’ll have to kick off and twist the throttle slowly to get going again at high speed.
im building an external pack with those samsung 30q batteries very good quality cells
dude... you're way too dependent on this scooter. it's not meant to ride in rough terrain like the one that's in the previous video. This is like a toy which does not replace my car when i need a ride to work
+intra morph my work is only 3km away. I could easily ride a bicycle, im just lazy. The rough riding is all for fun
ahh yeah 3km is very close got ya
you'r screen protector is miss alighned on your phone
i can't find a good glass screen protector for the curved edges of a samsung s7.
omg I was totally trolling, thanks for the video tutorial though haha, have you seen the ones where you have to cute the GEL with UV light ? I' was told those were the only good ones, they're about 16$ on aliexpress
haha no worries, is it called Whitestone Dome Glass Screen Protector? i may try it on the next phone i get, thanks!