I love this video. Very informative and straight to the point. Sometimes the Americans tell us what the dog is having dinner before finally getting onto the subject we’re all there for.
Hi Lee, you have just made my life easier I get asked a lot how to connect more than on pack together and trying to explain it in a comment or text is a pain. Now I can just send them this link. Great post very well explained.
Thanks George, I wanted to answer the questions we all get- a lot - without resorting to ohms law that most asking these questions will not understand so still plug in packs of different voltages in parallel and wonder why one gets super hot! ;)
I'm really glad to see that you respect your followers. I mean The JST wires not the xt60 wires. For xt60 you explained how but I don't know what to do with JST( I mean white conector)
This is exactly what i needed to see! I run micro rock crawlers and need to keep the batteries to 2s max. I can find many options for large capacity micro 2s batteries, but with the limited space of the trucks many times they are either too big or throw off the center of gravity. Thank you for the info!
Great information. I find myself using these methods on smaller LIPOs as sometimes you just can't find the size and weight of battery for a specific plane. Thanks for the video and Happy Flying!
Honestly, i know its been 2 years, but this is perfect, knowledge, the effects, and even test questions. top content this. Edit question for anyone:D. how about charging these? need a parallel charging board or atleast a charger with 2 balans lead inputs? i got a hota d6 pro with 2 charge ports and balans leads(2 seperate channels) does that work?
Awesome video, It gives me an idea for my Ebike. What do you guys think? Currently I have a 52 volt 13ah battery running a (rated at) 1500 watt motor. My controller is rated at 30 amps 52v. It hits 28mph on flat and has a range of about 25~miles. Im thinking to add another identical 52v 13ah battery. If I wire up both batteries in series or parallel what would I get? Should I switch to an upgraded 72V 3000W 100A controller?
Thanks for the great information....I didn't know you can do series and parallel together. I also like your sliding battery indicators.....even day is a school day!! Thankyou 👍
I believe if you hook up two lipos in parallel that are charged at different voltages there is a potential of some lipo damage. IE, connect a 3s at say 10.6v in parallel to a second at 12.6v, would there not be a large current between the two lipos to equalize voltage. I haven't tried it, but I suspect you'd have a couple warm puffy lipos after that. If that is not the case, please ignore, but if it is the case you might want to highlight that warning/note. It is mentioned on your warning page, but if it is missed the results could be unfortunate.
Connecting any batteries in parallel with different voltages will result in a current flowing equal to the difference divided by the internal resistance of the batteries. If you calculate the amperage it's not massive unless you have two packs with wildly different voltages. That currect that flows can be above the 'c' rating of the packs until the charge starts to equal out. Bottom line - you have to be careful, hence the warnings and my advice to just buy a 6s pack now rather than use 2 x 3s packs.. ;)
I purchased a retroid pocket 2 and it uses a 3.7v 4000mah battery, I want to add another battery into it so 2*3.7v 4000mah, do I need to do anything special to make this safe both batteries have built in protection and are the same
Does this also apply when you have batteries with a BMS in it? I have 4, 650Wh 54.6v/48v batteries I want to put in paralell so I can have a 2.6Kwh Battery to power my Furnace for a few days or Boondocking in our trailer. How do I stop a massive Arc when I connect them together?
Hello Lee, I have a model that requires to battery packs. I'm using the standard 4.8V Eneloop packs. Would It be correct to simply use a standard Y cable as used for connecting 2 servos, to acheive a parallel setup, so both battery packs connected to the Y cable which then goes the FrSKy Receiver. Also what would happen if one battery pack failes, would I still have power to the receiver and servos from the other battery.
Connecting in parallel with give you the same voltage but increase the current capacity and runtime. If one of the batteries fails then there is a chance that it could also pull down the voltage of the other pack too.. best of luck!
Hi what's the best way to connect 2 esc and 2 motors to 1 3s lipo, do you just solder the wires from the esc's together? or is there a pre connector i can use?
You can use a PDB or you can simply solder them together. Be very careful that you observe polarity (all positive wires together, all GND wires together etc.)...
Thank you for the videos. As a sort of related topic, can I run 2 brushed whoop style motors off of one esc and would it be beter in parallel or series? I was going to do the re-purposing of an old micro drone to a paper airplane, like Peter Sripol, had done. He had used just the 2 back motors attached to the fc and placed them on a paper air plane.
Thanks for the info. I'm wondering about putting a 600amp battery isolation switch on my 1000w 48v ebike battery pack so it doesn't 'pop' when swapping batteries and I can use it as an anti theft measure. What's your thoughts?
... any time I run batteries in this fashion I always Buy 2 Identical batteries and having the leads Identical length is important as the battery cells all drain equally .. CHEERS !!!!
More context my lipo is a 7600 mah 7.4 v rated for 25c and a burst of 50c it is a traxxas id battery i want to combine them in parallel to become a 15,200 mah battery i am afraid that this would cause way to much amperage for the vxl 3s system to handle. I would like to have longer run time on my rc car with this setup.
The model will pull the current it needs from the batteries. It isn't the batteries that force me model to take more current than it'll handle.. Best of luck
At the end of this video you were connecting multiple lipo packs up, 2 setz of batteries in series and then connecting those 2 sets in parallel, my question to you is can this setup be reversed around and have 2 sets of batteries connected in parallel and then those 2 sets joined up in series?
Good informative video as always. _When you look here can you tell me if you have done a video on the effect of higher capacity on usable battery life. Unusually I can't find one using the search but I'm sure you've covered it somewhere_
I've not made one. In my experience battery life is more a factor of the quality of the pack and how well it's looked after (Not over-disharged, balanced now and again and not pulling more curremt than it's rated for).. happy flying!
@@Painless360 yeah that’s what I mean the negative to positive between packs, can you just directly connect those positive to negative wires like as in cutting both cords, stripping them, meshing the wires together, and then using that heat activating shrink wrap stuff that I can’t remember the name of right now
It's the weight that results in more power being used to fly. So if you double the battery capacity that doesn't mean that you get twice the flying time due to the increased weight.. Happy flying!
quick question buddy I was told come here.had a qav105 sent to me by pepe prawns for a progect I have here in the uk teaching a few kids.czme with reciever.bound qx7 in d8 mode as that was all I could.at first in reciever tab all bars are moving on there own while not touching radio.pluss all mapped incorrect.updated betaflight and setup another new model it corrected mapping but still all bars including throttle ect are all moving up and down random on there own.aert taer no avail.is the reciever done.the quad is bran new.any help.if could explain easy fix please.thznks buddy.
Painless360 the done all that allready buddy.im familiar with setup but something wrong.half the reciever bars are moving back and forth a lot on there own.
Painless360 after updating and creating another new model they are no longer mapped incorrect.i have tried all uarts.aert taer.can only bind d8 mode.sticks move correct order but they allso move on there own a lot.id say top six from yaw .pitch role throttle and then 3 more move.without touching radio.as stated tried all 3 modes but only d8 binds.stick movement correct after update but still aggressive stick movement without touching radio.as you showed in your video a little movement is natural but mine move back all the way then forward on there own 1 2 sometimes 3 togeather
If it moves that much on the channel monitor screen on the radio then I'd think about replacing the gimbals. A little movement is normal.. Best of luck
I don't use batteries with BMS here. If it worked it would give you a 48v pack of whatever the max c rating was of one pack. See my video on it.. Best of luck
Hello 👋 I have a question Can i connect two 36V battery with some little difference because one is about 12AH and the second is 10Ah ❓ I will connect them to a 72V electric scooter controller and i will like to know if i can charge both together with the controller :? Thank you
If you are increasing the current then you do. If you Google for a AWG table you should find what you need. Most packs have a smaller gauge than you would expect for the max amps...
So say I would connect two 4s 1300 mah lipo bats after when I need to charge do I need to not balance charge or is there a way to connect the balance lead so it can be done?
I wonder batteries connect in series cause serious damage to ESC. I have broken my esc several times. I think when full throttle, the two battery works different at same time
@@Painless360 im trying to expand the battery capacity of my bluetooth case from 300mAh to around 600, but only have a spare 450mAh battery, can i get away with the 150mAh difference?
Maybe you can but it should not be efficient. It is i thnink only a good idea if you have an old 850 mAh which hast lost capacity down to to 750 mAh and parallel connect this with a new 750 mAh battery....
I own an electric scooter. It has one battery pack and I own a seperate identical battery pack. I want to add a second pack. Would I run this in series, or in parallel? Please advise. TY
Hello good evening. I wanted to combine to already assembled battery packs. Four 40V 6ah batteries to make them 40V 24AH. These are lithium batteries. Can I do this even tho the batteries are already assembled packs? All the same brand, voltage and Ah.
What are the risks of the" push-me/pull-you" effect of connecting Lipos in parallel? While the're being used, cross current drain should be minimal, but I used to work with large computer UPS backup systems with batteries in parallel, and they start to 'fight' each other if left connected without constant charging. I've seen guys unplug the Y connector from the ESC but leave the two Lipos connected together at the end of a day which looks risky to me.
The current that would flow between two batteries if the voltage is a different would be the difference in voltage / the internal resistance of the actual packs themselves (usually 5-15 milliohms per cell). In practice this is usually self-limiting, and quickly drops to a level that safe for both batteries. The danger is that if the voltage is a wildly different and the internal resistance is low, then the current can be above the safe charging current rating and potentially damage one of the packs. If the packs are close in voltage then it should be fine..
Hello, I'm building a 5s plane, the motor is an NTM 3536 1800kv turnigy coupled with a 6 × 6 propeller (consumes 57amp) and an 80a esc. I would like to feed it with a 3s and 2s lipo in series but I have some problems regarding the C rating and mah. For example, I have a 1000mah 70C-130C 2s (500mah × 2 cells) and a 1500mah 35C-70C 3s (500 × 3 cells). The calculation of the amp of the 2s is 70 × 1000 = 70000 = 70a, while the 3s 47x1500 = 70500 = 70.5a. By making this calculation, I have a current of 70a from both batteries and 500mah for cell. It's correct?
@@Painless360 Great video! Found it very helpful. If you add a parallel string to a pack, does that effectively double the amount of amps that the whole pack can output vs. one single pack? Thanks.
Another theoretical question. Are there multiple ways to wire a particular series and parallel configuration? For example, I can see that you can wire two parallel stacks first and then just a wire to increase the voltage across both packs. Or, you could create the higher voltage series packs and then hook up the parallel strings... Hope this makes sense and thank you.
Thanks for another great video!! I know this is a couple years old, but just bought a used S1000 and it came with tons of extras, including a lot of pre-made 2 into 1 cables. Some are one cord that splits into 2, and some are shaped like a triangle sort of. From your video I'm guessing the triangle one is the series, and the straight one that splits in the middle is parallel. My other question is, can the current flow both ways? Meaning, if we were using the parallel diagram of yours that's at the 6:45 mark, you state what will come out of the single connector, to whatever you are powering. Now lets say I wanted to hook a 5s or 6s 3000mah, to the single end and I wanted to power one of those little 1s charging boards, better yet, to stay with the diagram, lets say I had 3 of them and I had a ton of whoop batteries to charge, will the current go the other direction? Thanks for any info!
Current can flow in either direction if it is just a wire. Be very careful when connecting batteries up in parallel or series. It's easy to get confused and have a problem..
so if i have 4 6s 5000mah 22.2v packs and take 2 run in series to get 12 s44.4 v5000mah then take the other 2 run those in parallel to get6s 22.2 v and 10000 mah then i take those run those 2 and run those in series to get 18 s 66.6v and i wana say my mah stays at 10000 am i correct or can i not do that?
@@Painless360 ok that makes sense. I'm just trying to learn something new and I'm teaching myself all about this subject. Plus I ride eBoard and I'm trying my hand at building after having several company's burn me. One more question if that's ok so what happens with the discharge and the wh do they change in series or in parellel?
I'm just my better is like I said 6s65c discharge 5000mah22.2 v111wh . I get in series the voltage doubles and mah stays the same and parellel the mAh gets greater and volts stay uncharged. But what I didn't hear I probably should rewatch cause you probably did say.. Lol
Higher capacity aka "more fuel in the tank" if you like, it also allows you to pull more amps than with a single pack, that way you can achieve higher wattage (voltage x amps) for more power and speed.
I run a 4s 5000mah battery in my quad. I want to run two in parallel so I get 4s 10000mah. Will this affect the ESCs, FC, gimbal etc? All I want is longer flight time. I don't race or anything just take videos with my camera on the drone.
swankypotter It won't effect your electronics. Voltage stays the same. On the other hand, it will be effected by the weight of the packs. Your motors have to work a little harder to lift your copter.
If all you're looking for is longer flight times then apart from weight and manoverability as Jos mentioned, it should be ok. BUT, with 2 Lipos you now have double the max current (so if one is 30C you now have 60C) and you need to check your ESC and motor capabilities (not to mention the wiring current capacity). Lee has a good article on this site on the 10% rule of Battery, ESC & Motor).
As others have done an amazing job of answering you, I'll answer quickly too :) connecting in parallel the voltages are the same so the electronics will be ok. It's just like plugging in pack with more mAh.
@@Painless360 Yes, but what is the difference in terms of flying in series versus parallel? Does series allow for longer flying time, does parallel provide more power, more speed? I would like to take the time to thank you for your videos and for taking the time to reply to my questions. I love this hobby and I know that you do too!
One thing I don’t understand is when you connect in serial how the mah does not increase because you have two batteries with 2000mah worth of charge yet you keep only 1000mah? I assure this is because double the voltage so the batteries drain twice as fast?
The current that flows through the model also flows through each of the cells too, using capacity at the same time so you don't get double. That's how the cells connect in a lipo park..
So conceivably you could make a 12s 5000mah using 2x 3s in series, together with 3x 2s 5000mah in series, so you have two 6s 5000mah in series again for 12s 5000mah. Just asking as a tester or emergency electric skateboard battery DIY. Cheers again
Mixing and matching different packs can be dangerous as the resulrant battery pack is only as strong as the weakest link and can overstress pieces easily.. Be very careful.
@@Painless360adding a 10s and a 2s in series, same spec18650 batteries cells, to make a 12s is okay? Safer and less connections, 2x batteries only to connect.
So basically: if you want a 10s power for a esk8, it would be in series. But if you want more range, you would need two of the 10s with the same parallel capacity to make it longer. Making sure they're both equally charged before doing so. So If I did this with my 10s5p, it would be a 10s10p connector, doubling the range capacity while keeping the same voltage? Interesting.
Help me plz im building a huge hexa: Amp drawal will be 180×6=1080 amps The voltage is 60 volts i think thats 14s correct me if im wrong Im considering to buy multiple 4500 mah, 4s, 45c battery How can u connect them togeher? Imagine i got infinity numbers of those batteries or suggest me other battery ratings
Can I join a 36v 10ah and 24v 10ah in series to make a 60v 10ah lithium battery? Would rather add a 24v battery to the one I’ve got rather than buy a 60v
@@Painless360 thank u man I didnt expect ur reply, anyway I am ur fan from India , I wish always best friend like u , but i dont hava passport 😁to meet u as a friend this is my fathers photo in profile
The best practices I've learned about composed batteries is to ALWAYS buy/charge/discharge the batteries packs together like they are married (until death ^^). It's the same process for Li-Po or Li-Ion. - Buy them together (understand same brand/model/capacity) can provide a good chance they came from the same batch or a close one and have similar internal caracteristics. A composed pack is worth the weakest element of the assembly. If they are quite similar, the pack should have good and consistent performance/lifespan/charge time/... - Charge/discharge them together ensure they age the same way and keep the consistency of the behaviour of the composed pack. Finally, to prevent some issues, I mention a serial build will forgive more easily the slight differences between the batteries than a parallel one. In an heterogenous (new&old, charged¬ charged enough batteries) parallel pack, the batteries will try to balance themselves before powering the model, the efficiency/autonomy of the pack will be awful and not to mention the monitoring of the elements can't be accurate and can lead to an over charge/discharge of an element of the pack. It can be really hazardous. ("Come on baby light my fire... Come on baby light my fire... Try to set the night on fire..." - Not the original meaning but quite applicable... ^^) That's why I suggest, when making a serial & parallel build, to start putting the batteries in parallel first (each small group is more easilly manageable) and after put all the groups in series. For the picky ones, we can also add some diodes in the parallel builds to prevent current exchange between the batteries. A PAB (power assembly board) with sensors, diodes and safety fuses can be really handy for the big builds. My 2 cents.
Hello Alexis, thanks for the very useful comment. Could you help how can i put diode between the batteries in orden to block the current between the batteries? Many thanks in advance
Just don't do this with smart/intelligent batteries in parallel or one battery might think its getting charged and will overcharge and overheat. (from my own experience)
If i wanted to connect 4 batteries in series with 3 triangular series attachments, can i work? / \ + / \ - /______\ /_\ /_\ 🔋 🔋 🔋 🔋 Dont mind the terminals of the emogis batteries
Painless360 why wont it work? looks like he has 2 parallel packs connected in series. you did that as a demonstration at the end with 2 series packs connected in parallel.
i think bc of what you said his question is would this be how to do it in series, and no he would need to connect all 4 at the bottom neg to pos@@aliensanonymous5063
Which way should I do it, using 6 of my lipos make 2 pairs of 3 lipos in parralel first and then attach them in series for 3P2S or make 3 pairs of 2 lipos in series first and then attach them in paralel for 2S3P Does it matter which way I do it, which way is better / safer and why? Thank you in advance!
@@Painless360 I made a diagram in your style so you understand what I mean postimg.cc/LJtgqMJG. Does it matter which way I do it, which way is better / safer and why? I hope you understand my question, sorry I phrased it badly. I enjoyed your video btw
Thank you for this video because I can tag the people on my channel trying to tell me that by adding two 7.4 there's no way you can do that to a 4S and I'm thinking to myself how brain dead are these people. And you explained it perfectly sir so and what's great I just noticed you have the same exact connectors that I have. What I love about those connectors is there is so many people including myself that had a bunch of 7.4 volts laying around and we all thought we have to buy some new 3s or 4S or 6s. Like the 6s those are super expensive but you can do the same thing with two three as batteries
I love this video. Very informative and straight to the point. Sometimes the Americans tell us what the dog is having dinner before finally getting onto the subject we’re all there for.
Hi Lee, you have just made my life easier I get asked a lot how to connect more than on pack together and trying to explain it in a comment or text is a pain. Now I can just send them this link. Great post very well explained.
Thanks George, I wanted to answer the questions we all get- a lot - without resorting to ohms law that most asking these questions will not understand so still plug in packs of different voltages in parallel and wonder why one gets super hot! ;)
I'm really glad to see that you respect your followers. I mean The JST wires not the xt60 wires. For xt60 you explained how but I don't know what to do with JST( I mean white conector)
The balance tap is used for charging to make sure that the cells are all charged to 4.2v. See my LIPO charging video...
saved my life on this one! thank you very much
This is exactly what i needed to see! I run micro rock crawlers and need to keep the batteries to 2s max. I can find many options for large capacity micro 2s batteries, but with the limited space of the trucks many times they are either too big or throw off the center of gravity. Thank you for the info!
Awesome tutorial! I was working on something right now! This tutorial helped me so much! Thank you!
nice video, confirmed what I believed was possible. although with lipo batteries I'm always overly cautious. thank you
Yet another masterpiece Lee
Great information. I find myself using these methods on smaller LIPOs as sometimes you just can't find the size and weight of battery for a specific plane. Thanks for the video and Happy Flying!
Honestly, i know its been 2 years, but this is perfect, knowledge, the effects, and even test questions. top content this.
Edit question for anyone:D. how about charging these? need a parallel charging board or atleast a charger with 2 balans lead inputs? i got a hota d6 pro with 2 charge ports and balans leads(2 seperate channels) does that work?
Thank you for explaining parallel & series connections. Would you balance charge the batteries separately when needed?
I always charge the packs seperately. Happy flying
Awesome video, It gives me an idea for my Ebike. What do you guys think? Currently I have a 52 volt 13ah battery running a (rated at) 1500 watt motor. My controller is rated at 30 amps 52v. It hits 28mph on flat and has a range of about 25~miles. Im thinking to add another identical 52v 13ah battery. If I wire up both batteries in series or parallel what would I get? Should I switch to an upgraded 72V 3000W 100A controller?
i might of missed it but what about the (smaller connector on the battery ) dose it have to be paired also or just 1 is ok ?
Charge the batteries seperately. This video is only covering how to connect them up for use in the model.. Happy flying
Thanks for the video, very helpful & easy to follow!
Thanks for the great information....I didn't know you can do series and parallel together. I also like your sliding battery indicators.....even day is a school day!! Thankyou 👍
100k soon
Great videos 👍🏻👍🏻
I believe if you hook up two lipos in parallel that are charged at different voltages there is a potential of some lipo damage. IE, connect a 3s at say 10.6v in parallel to a second at 12.6v, would there not be a large current between the two lipos to equalize voltage. I haven't tried it, but I suspect you'd have a couple warm puffy lipos after that. If that is not the case, please ignore, but if it is the case you might want to highlight that warning/note. It is mentioned on your warning page, but if it is missed the results could be unfortunate.
Connecting any batteries in parallel with different voltages will result in a current flowing equal to the difference divided by the internal resistance of the batteries. If you calculate the amperage it's not massive unless you have two packs with wildly different voltages. That currect that flows can be above the 'c' rating of the packs until the charge starts to equal out. Bottom line - you have to be careful, hence the warnings and my advice to just buy a 6s pack now rather than use 2 x 3s packs.. ;)
Thankyou for explaining this
I purchased a retroid pocket 2 and it uses a 3.7v 4000mah battery, I want to add another battery into it so 2*3.7v 4000mah, do I need to do anything special to make this safe both batteries have built in protection and are the same
Does this also apply when you have batteries with a BMS in it?
I have 4, 650Wh 54.6v/48v batteries I want to put in paralell so I can have a 2.6Kwh Battery to power my Furnace for a few days or Boondocking in our trailer.
How do I stop a massive Arc when I connect them together?
Hello Lee, I have a model that requires to battery packs. I'm using the standard 4.8V Eneloop packs. Would It be correct to simply use a standard Y cable as used for connecting 2 servos, to acheive a parallel setup, so both battery packs connected to the Y cable which then goes the FrSKy Receiver. Also what would happen if one battery pack failes, would I still have power to the receiver and servos from the other battery.
Connecting in parallel with give you the same voltage but increase the current capacity and runtime. If one of the batteries fails then there is a chance that it could also pull down the voltage of the other pack too.. best of luck!
Thank you, great video.
Hi what's the best way to connect 2 esc and 2 motors to 1 3s lipo, do you just solder the wires from the esc's together? or is there a pre connector i can use?
You can use a PDB or you can simply solder them together. Be very careful that you observe polarity (all positive wires together, all GND wires together etc.)...
Hi thanks for your reply but what is a PDB?@@Painless360
Google 'PDB painless360' and you'll get the answers you need. Check out my builds aimed at beginners of you are new to this..
Thanks for your help@@Painless360
A very good video....Even a baby would understand it...
In case no bms,If one of the series connected batteries is damaged, all other batteries will be damaged?
Thank you for the videos.
As a sort of related topic, can I run 2 brushed whoop style motors off of one esc and would it be beter in parallel or series? I was going to do the re-purposing of an old micro drone to a paper airplane, like Peter Sripol, had done. He had used just the 2 back motors attached to the fc and placed them on a paper air plane.
If the ESC can handle it, yes. You'd have to connect them in parallel so they still get the same voltage. I'd use one esc per motor myself..
Thank you! I will take your advice and stick with 1 motor per esc.
Great info! 🎉🎉
Thanks for the info. I'm wondering about putting a 600amp battery isolation switch on my 1000w 48v ebike battery pack so it doesn't 'pop' when swapping batteries and I can use it as an anti theft measure. What's your thoughts?
If it's rated for the voltage and current you will be using it'll work. Watch for erosion of the contacts over time though.. Best of luck!
... any time I run batteries in this fashion I always Buy 2 Identical batteries and having the leads Identical length is important as the battery cells all drain equally .. CHEERS !!!!
will the higher amperage in parallel batteries cook my electronics if they are not rated for the combined amperage that results from parallel
More context my lipo is a 7600 mah 7.4 v rated for 25c and a burst of 50c it is a traxxas id battery i want to combine them in parallel to become a 15,200 mah battery i am afraid that this would cause way to much amperage for the vxl 3s system to handle. I would like to have longer run time on my rc car with this setup.
The model will pull the current it needs from the batteries. It isn't the batteries that force me model to take more current than it'll handle.. Best of luck
@@Painless360 allright cool thank you much
At the end of this video you were connecting multiple lipo packs up, 2 setz of batteries in series and then connecting those 2 sets in parallel, my question to you is can this setup be reversed around and have 2 sets of batteries connected in parallel and then those 2 sets joined up in series?
Yes
Good informative video as always.
_When you look here can you tell me if you have done a video on the effect of higher capacity on usable battery life. Unusually I can't find one using the search but I'm sure you've covered it somewhere_
I've not made one. In my experience battery life is more a factor of the quality of the pack and how well it's looked after (Not over-disharged, balanced now and again and not pulling more curremt than it's rated for).. happy flying!
Yep- so many variables. It was worth asking. Thanks
Great teacher
In a series connection can you just wire the positive-negative wires straight together?
Not sure what you mean. The negative wire from one pack connects to the positive wire on the second pack... Best of luck
@@Painless360 yeah that’s what I mean the negative to positive between packs, can you just directly connect those positive to negative wires like as in cutting both cords, stripping them, meshing the wires together, and then using that heat activating shrink wrap stuff that I can’t remember the name of right now
yeah but make sure you discharge the packs to a safe voltage before heating the wires@@thethrongler722
I'm building a hexacopter so should I go for 2 ×3300mah 4s lipo or 5500mah 4s .both of them cost same! So which one should I go for?
The one that is light enough for your model..
@@Painless360 does extra 1100mah increase some flight time?
It's the weight that results in more power being used to fly. So if you double the battery capacity that doesn't mean that you get twice the flying time due to the increased weight.. Happy flying!
@@Painless360 thanks
quick question buddy I was told come here.had a qav105 sent to me by pepe prawns for a progect I have here in the uk teaching a few kids.czme with reciever.bound qx7 in d8 mode as that was all I could.at first in reciever tab all bars are moving on there own while not touching radio.pluss all mapped incorrect.updated betaflight and setup another new model it corrected mapping but still all bars including throttle ect are all moving up and down random on there own.aert taer no avail.is the reciever done.the quad is bran new.any help.if could explain easy fix please.thznks buddy.
Please see my Betaflight BNF setup video for the steps I follow.. hope it helps..
Painless360 the done all that allready buddy.im familiar with setup but something wrong.half the reciever bars are moving back and forth a lot on there own.
So what have you checked? Are they moving properly on the radio? What troubleshooting have you done? Have you tried another BF version....
Painless360 after updating and creating another new model they are no longer mapped incorrect.i have tried all uarts.aert taer.can only bind d8 mode.sticks move correct order but they allso move on there own a lot.id say top six from yaw .pitch role throttle and then 3 more move.without touching radio.as stated tried all 3 modes but only d8 binds.stick movement correct after update but still aggressive stick movement without touching radio.as you showed in your video a little movement is natural but mine move back all the way then forward on there own 1 2 sometimes 3 togeather
If it moves that much on the channel monitor screen on the radio then I'd think about replacing the gimbals. A little movement is normal.. Best of luck
Thanks you saved my day :)
I have4 no's 12 v lifepo4 it all have inbuit bms,
Can i connect all these 4 in series without any seperate bms?
I don't use batteries with BMS here. If it worked it would give you a 48v pack of whatever the max c rating was of one pack. See my video on it.. Best of luck
@@Painless360 ok
What's the other connector of the batteries (white plug) for? Why does it have 3 pins?
ruclips.net/video/fyjDGSPHmYI/видео.html
Can you run two 3s packs in parallel with different c an mah ratings?
You shouldn't..
As long as the voltage of both packs are the same it will work fine.
Hello 👋 I have a question
Can i connect two 36V battery with some little difference because one is about 12AH and the second is 10Ah ❓ I will connect them to a 72V electric scooter controller and i will like to know if i can charge both together with the controller :? Thank you
I would not connect batteries in series or parallel with different specifications unless you know what you are doing.. Best of luck!
If im wanting to add 6 motors, 3 ESC's and 3 batteries, can you attach one brain to all 3 ESCs? Looking at other ways to do multiple batteries
By 'brain' do you mean the ESC?
As you put in more batteries in series/parallel, don't you need to up the wire size? Can you point me to a table you use to spec it?
If you are increasing the current then you do. If you Google for a AWG table you should find what you need. Most packs have a smaller gauge than you would expect for the max amps...
So say I would connect two 4s 1300 mah lipo bats after when I need to charge do I need to not balance charge or is there a way to connect the balance lead so it can be done?
I'd always charge packs separately.. Happy flying!
Painless360 oh see I was planning on connecting them together so I didn’t need to deal with extra wires and weight and sloppiness lol
So more mah is battery life and more volts means you can pickup more?
Pretty much... Happy flying
I wonder batteries connect in series cause serious damage to ESC. I have broken my esc several times. I think when full throttle, the two battery works different at same time
Can I combine a 3s lipo to a 4s lipo of the same cells in series with the intention to make a 7s lipo pack?
If the cells are identical, yes
@@Painless360 I thought so but wasn't a 100% sure. Thanks for the quick response.
can you conect 2 different mAh but same voltage batteries in parallel?
Not recommended. One will 'empty' faster than the other.
@@Painless360 im trying to expand the battery capacity of my bluetooth case from 300mAh to around 600, but only have a spare 450mAh battery, can i get away with the 150mAh difference?
See previous answer. Best of luck.
Maybe you can but it should not be efficient. It is i thnink only a good idea if you have an old 850 mAh which hast lost capacity down to to 750 mAh and parallel connect this with a new 750 mAh battery....
Could I use this for 12s for my heli? I want to be able to plug in my 6s battery for testing until I get my other batteries for my 12s setup
Yes.
@@Painless360 cool thanks
I own an electric scooter. It has one battery pack and I own a seperate identical battery pack. I want to add a second pack. Would I run this in series, or in parallel? Please advise. TY
If you want to keep the voltage the same but double the battery capacity it'll be parallel. Be careful!
Can this be done on a NiCD / NIMH Battery? Both parallel or series
Yes. Best of luck
Hello good evening. I wanted to combine to already assembled battery packs. Four 40V 6ah batteries to make them 40V 24AH. These are lithium batteries. Can I do this even tho the batteries are already assembled packs? All the same brand, voltage and Ah.
Yes. See the later version of the video that answers the common questions.. Best of luck
What are the risks of the" push-me/pull-you" effect of connecting Lipos in parallel? While the're being used, cross current drain should be minimal, but I used to work with large computer UPS backup systems with batteries in parallel, and they start to 'fight' each other if left connected without constant charging.
I've seen guys unplug the Y connector from the ESC but leave the two Lipos connected together at the end of a day which looks risky to me.
The current that would flow between two batteries if the voltage is a different would be the difference in voltage / the internal resistance of the actual packs themselves (usually 5-15 milliohms per cell). In practice this is usually self-limiting, and quickly drops to a level that safe for both batteries. The danger is that if the voltage is a wildly different and the internal resistance is low, then the current can be above the safe charging current rating and potentially damage one of the packs. If the packs are close in voltage then it should be fine..
Excellent 👍👌😀
So i can run 2× 7.4v 1600mah 30c in my rc i just dont know the max voltage of my rc
Hello,
I'm building a 5s plane, the motor is an NTM 3536 1800kv turnigy coupled with a 6 × 6 propeller (consumes 57amp) and an 80a esc. I would like to feed it with a 3s and 2s lipo in series but I have some problems regarding the C rating and mah. For example, I have a 1000mah 70C-130C 2s (500mah × 2 cells) and a 1500mah 35C-70C 3s (500 × 3 cells). The calculation of the amp of the 2s is 70 × 1000 = 70000 = 70a, while the 3s 47x1500 = 70500 = 70.5a. By making this calculation, I have a current of 70a from both batteries and 500mah for cell. It's correct?
It's not. In a 2s pack all of the cells have the rated mAh and current rating. See my other videos on the topic... best of luck
@@Painless360 Thanks. It's important for me and for my 5s airplane project. Have a nice day😁
How about the C rating? Does it adds up too on series?
No.
@@Painless360 Great video! Found it very helpful. If you add a parallel string to a pack, does that effectively double the amount of amps that the whole pack can output vs. one single pack? Thanks.
Another theoretical question. Are there multiple ways to wire a particular series and parallel configuration? For example, I can see that you can wire two parallel stacks first and then just a wire to increase the voltage across both packs. Or, you could create the higher voltage series packs and then hook up the parallel strings... Hope this makes sense and thank you.
Great work, Lee! 😊
You get more C rating when connecting in parallel... But I guess it's not linear. 😉
should i run my mini erevo in series or parallel? the batteries are 2s
Depends if you're looking for the same voltage but longer flights..
Series makes it 4S and will fry your VXL3m ESC! Hope you found that already :)
Thanks for another great video!! I know this is a couple years old, but just bought a used S1000 and it came with tons of extras, including a lot of pre-made 2 into 1 cables. Some are one cord that splits into 2, and some are shaped like a triangle sort of. From your video I'm guessing the triangle one is the series, and the straight one that splits in the middle is parallel. My other question is, can the current flow both ways? Meaning, if we were using the parallel diagram of yours that's at the 6:45 mark, you state what will come out of the single connector, to whatever you are powering. Now lets say I wanted to hook a 5s or 6s 3000mah, to the single end and I wanted to power one of those little 1s charging boards, better yet, to stay with the diagram, lets say I had 3 of them and I had a ton of whoop batteries to charge, will the current go the other direction? Thanks for any info!
Current can flow in either direction if it is just a wire. Be very careful when connecting batteries up in parallel or series. It's easy to get confused and have a problem..
@@Painless360...I am, promise, that's why doing a bunch of research thanks!
so if i have 4 6s 5000mah 22.2v packs and take 2 run in series to get 12 s44.4 v5000mah then take the other 2 run those in parallel to get6s 22.2 v and 10000 mah then i take those run those 2 and run those in series to get 18 s 66.6v and i wana say my mah stays at 10000 am i correct or can i not do that?
If you connect them together you'll end up with a 66.6v, 5000mAh pack as you can only discharge as much as the lower rating will allow..
@@Painless360 ok that makes sense. I'm just trying to learn something new and I'm teaching myself all about this subject. Plus I ride eBoard and I'm trying my hand at building after having several company's burn me. One more question if that's ok so what happens with the discharge and the wh do they change in series or in parellel?
I'm just my better is like I said 6s65c discharge 5000mah22.2 v111wh . I get in series the voltage doubles and mah stays the same and parellel the mAh gets greater and volts stay uncharged. But what I didn't hear I probably should rewatch cause you probably did say.. Lol
what will happen to the c rating in both series and parallel ?
Series it stays the same...
@@Painless360 Can u give me equation please for parallel ?
Can I connect 2s and 1s lipo battery and use it as 3s battery please help I am New to lipo batteries
Yes as long as you follow the rules in the video. Batteries are so cheap now that I'd always recommend using the right one..
Does the parallel conection doubles the c rating?
Yes. more current and capacity, same voltage
@@Painless360 😁
Can I follow these steps to mate 2 lithium ion batteries in series ??
Yes
How about batteries paralel & batteries seri to join together ? Seri 3s & paralel 3s wich joining that is can sir ?
You can join them in lots of ways. Look for the s and p numbers in the battery listing to see how they do it.. Best of luck
@@Painless360 ok sir.i think you will made video for this content 😁
Thank You very much
I realize the benefit of more voltage but what is the advantage of having more amps available?
Higher capacity aka "more fuel in the tank" if you like, it also allows you to pull more amps than with a single pack, that way you can achieve higher wattage (voltage x amps) for more power and speed.
@@overthetarget9401 but will the extra amperage fry electronics or will they know not to pull that extra amperage unless needed
Soo what if i use 2x 4s 6000mah 50c packs for a DC charger what do i need to stack?! Serie or parallel?
Depends on if you want to double the voltage or double the current...
I run a 4s 5000mah battery in my quad. I want to run two in parallel so I get 4s 10000mah. Will this affect the ESCs, FC, gimbal etc? All I want is longer flight time. I don't race or anything just take videos with my camera on the drone.
swankypotter It won't effect your electronics. Voltage stays the same.
On the other hand, it will be effected by the weight of the packs. Your motors have to work a little harder to lift your copter.
Jos van der Weide yes I understand the weight will not help but the flight time will over power that anyway. Thanks for the reply
If all you're looking for is longer flight times then apart from weight and manoverability as Jos mentioned, it should be ok. BUT, with 2 Lipos you now have double the max current (so if one is 30C you now have 60C) and you need to check your ESC and motor capabilities (not to mention the wiring current capacity). Lee has a good article on this site on the 10% rule of Battery, ESC & Motor).
As others have done an amazing job of answering you, I'll answer quickly too :) connecting in parallel the voltages are the same so the electronics will be ok. It's just like plugging in pack with more mAh.
Very informative, but what are the benefits in terms of flying?
More battery = more flying.
@@Painless360 Yes, but what is the difference in terms of flying in series versus parallel? Does series allow for longer flying time, does parallel provide more power, more speed?
I would like to take the time to thank you for your videos and for taking the time to reply to my questions. I love this hobby and I know that you do too!
One thing I don’t understand is when you connect in serial how the mah does not increase because you have two batteries with 2000mah worth of charge yet you keep only 1000mah? I assure this is because double the voltage so the batteries drain twice as fast?
The current that flows through the model also flows through each of the cells too, using capacity at the same time so you don't get double. That's how the cells connect in a lipo park..
What kind of cereal do you use 🤔...I like lucky charms
Anything with currents 😉
Sorry to bother,Can two 3.7 Tiny lipo's need a balance charger instead of one usb charger?
As those batteries are only one cell then they dont need to be balanced (you need two or more cells for that)... hope that helps..
So conceivably you could make a 12s 5000mah using 2x 3s in series, together with 3x 2s 5000mah in series, so you have two 6s 5000mah in series again for 12s 5000mah.
Just asking as a tester or emergency electric skateboard battery DIY.
Cheers again
Mixing and matching different packs can be dangerous as the resulrant battery pack is only as strong as the weakest link and can overstress pieces easily.. Be very careful.
@@Painless360adding a 10s and a 2s in series, same spec18650 batteries cells, to make a 12s is okay?
Safer and less connections, 2x batteries only to connect.
So basically: if you want a 10s power for a esk8, it would be in series. But if you want more range, you would need two of the 10s with the same parallel capacity to make it longer. Making sure they're both equally charged before doing so.
So If I did this with my 10s5p, it would be a 10s10p connector, doubling the range capacity while keeping the same voltage?
Interesting.
Parallel keeps the voltage but adds up the capacity and amperage.. Happy flying!
Help me plz im building a huge hexa:
Amp drawal will be 180×6=1080 amps
The voltage is 60 volts i think thats 14s correct me if im wrong
Im considering to buy multiple 4500 mah, 4s, 45c battery
How can u connect them togeher? Imagine i got infinity numbers of those batteries or suggest me other battery ratings
Please see the videos in the 'Big Boys Toys' video playlist for videos on larger models..
@@Painless360 thanks ill definitely have a look
S λ M I Bawazir how did it turn out?
The parallel circuit slide at 6.42 says "connecting batteries in SERIES will:" :)
Sorry to point that out lol.
Thanks for that, hope it still made sense..
Can I join a 36v 10ah and 24v 10ah in series to make a 60v 10ah lithium battery? Would rather add a 24v battery to the one I’ve got rather than buy a 60v
Series connection adds the voltage but keeps the current the same...
All good but how to charge it
I would always separate the packs to charge personally. Best of luck!
@@Painless360 thank u man I didnt expect ur reply, anyway I am ur fan from India , I wish always best friend like u , but i dont hava passport 😁to meet u as a friend this is my fathers photo in profile
Painless School 👌
Sir you didn't tell us about how we serie the charging wires
I am not sure I understand the question, can you elaborate?
The best practices I've learned about composed batteries is to ALWAYS buy/charge/discharge the batteries packs together like they are married (until death ^^). It's the same process for Li-Po or Li-Ion.
- Buy them together (understand same brand/model/capacity) can provide a good chance they came from the same batch or a close one and have similar internal caracteristics. A composed pack is worth the weakest element of the assembly. If they are quite similar, the pack should have good and consistent performance/lifespan/charge time/...
- Charge/discharge them together ensure they age the same way and keep the consistency of the behaviour of the composed pack.
Finally, to prevent some issues, I mention a serial build will forgive more easily the slight differences between the batteries than a parallel one. In an heterogenous (new&old, charged¬ charged enough batteries) parallel pack, the batteries will try to balance themselves before powering the model, the efficiency/autonomy of the pack will be awful and not to mention the monitoring of the elements can't be accurate and can lead to an over charge/discharge of an element of the pack. It can be really hazardous. ("Come on baby light my fire... Come on baby light my fire... Try to set the night on fire..." - Not the original meaning but quite applicable... ^^)
That's why I suggest, when making a serial & parallel build, to start putting the batteries in parallel first (each small group is more easilly manageable) and after put all the groups in series.
For the picky ones, we can also add some diodes in the parallel builds to prevent current exchange between the batteries.
A PAB (power assembly board) with sensors, diodes and safety fuses can be really handy for the big builds.
My 2 cents.
Hello Alexis, thanks for the very useful comment. Could you help how can i put diode between the batteries in orden to block the current between the batteries? Many thanks in advance
Just don't do this with smart/intelligent batteries in parallel or one battery might think its getting charged and will overcharge and overheat. (from my own experience)
would this refer to traxxas id batteries
Nice & Thanks :)
I don't think it should be the same C rate to connect 2 lipos together as long as they the same V and Capacity . !
Unmatched cells in a pack cause issues. Same with batteries ;)
But how to blance
I don't understand the question..
is it possible to connect in series 4 no's 12 v lifepo4 battery in series.
All 4 battery module have bms,
Any special arrangement required
I don't use BMS but I always charge the packs seperately... Happy flying
@@Painless360 your pack 12 v dont have inbuit bms?
If i wanted to connect 4 batteries in series with 3 triangular series attachments, can i work?
/ \
+ / \ -
/______\
/_\ /_\
🔋 🔋 🔋 🔋
Dont mind the terminals of the emogis batteries
If I understand the diagram you’ve made that won’t work. All of the information I have is in the video ;) best of luck!
Painless360 why wont it work? looks like he has 2 parallel packs connected in series. you did that as a demonstration at the end with 2 series packs connected in parallel.
i think bc of what you said his question is would this be how to do it in series, and no he would need to connect all 4 at the bottom neg to pos@@aliensanonymous5063
I just want to hook two identical 520mah 3s batteries up to fly a 3s quad at 1040mah and not blow it up. So I'm here to try and learn.
Which way should I do it, using 6 of my lipos
make 2 pairs of 3 lipos in parralel first and then attach them in series for 3P2S
or
make 3 pairs of 2 lipos in series first and then attach them in paralel for 2S3P
Does it matter which way I do it, which way is better / safer and why?
Thank you in advance!
They would be very different packs... not the same at all..
@@Painless360 I mean should I connect in series or parallel first to make packs, which is better / safer and why
Both are and are regularly used to make larger battery packs. It is what the P and S stand for (ime. 2S2P).. Happy flying
@@Painless360 I made a diagram in your style so you understand what I mean postimg.cc/LJtgqMJG.
Does it matter which way I do it, which way is better / safer and why? I hope you understand my question, sorry I phrased it badly. I enjoyed your video btw
Watching this for a Game Boy mod lol
Thank you for this video because I can tag the people on my channel trying to tell me that by adding two 7.4 there's no way you can do that to a 4S and I'm thinking to myself how brain dead are these people. And you explained it perfectly sir so and what's great I just noticed you have the same exact connectors that I have. What I love about those connectors is there is so many people including myself that had a bunch of 7.4 volts laying around and we all thought we have to buy some new 3s or 4S or 6s. Like the 6s those are super expensive but you can do the same thing with two three as batteries