If u want it can still charge just remove the indicator of the circuit but u can't use the output usb port now. You can use the burnt up circuit by removing the indicator to charge lipo batteries
These cost £1 from Poundland in the UK, and INCLUDE the battery cell. I have several and they are quite useful for powering small projects with 5V such as a "USB" powered audio amplifier.
I bought two, two cell versions of these power banks and I used the westinghouse 18650 cells that are sold at walmart for the solar garden lights and I had to modify the case a little to fit the westinghouse cells but it worked and I actually use the power bank inside a radio that I built and the radio board connects straight to the battery (not the 5V out) of the power bank so it takes power directly from the 18650 cell and the radio works great. I charge the radio by charging the power bank.
You got a good one. I ordered 2. Both only supplied battery voltage, not 5V. One continuously lit the blue led. And the other had such a high quiescent drain it was not even any good as a rechargeable battery holder. Which is too bad, because the case design is actually very nice. I like the way the top clips in flush and securely.
Looks very similar to the power bank you can buy for £1 ($1.34 USD at todays rate) in the UK from 'Poundland' stores. They come with 1200 mAh battery already installed and has max discharge rate at 1amp.
hello! I bought one, but I instead of being operate by a spring is connected with wires, is there a way a can change to work as a 1865 battery charger? thank you so much
I've got a lot of these (18650 cell included) leftover from when banks and other stores basically gave them away for whatever reason. You could even walk into a bank other than your own, ask about information, and they'd give you a powerbank along with the pamphlet! I must say though, theyr're quite handy when you need to gt a lithium rechargeable battery for a project
I got 2 of them with the cell inside, but I didn't know that there was a cellless model One is a green one and one is a blue one, I had won the blue one from some english contest thing in elementary school (the poster had a picture of a macbook and I would have been very happy if I had gotten that)
I also have one 4000mAh one with the low battery warning, and just recently I got a big one with 2 outputs, 2 inputs and the ability to charge my device while I'm actively using it
I think the power bank is designed for non-protected cell. As non-protected cells, do not have circuit board on the top, they are slightly shorter. They sell these power banks in pound world with a battery for well 1 pound, if you live in the UK.
Gavin Davies True, but even these non-protected cells do have an interesting feature... it's called a CID (Current Interrupt Device). A little reading: batterybro.com/blogs/18650-wholesale-battery-reviews/18306003-battery-safety-101-anatomy-ptc-vs-pcb-vs-cid 😉😆
I've bought one similar to this power bank, at the same price though. I've put a brand new samsung 18650 flat top 2500mAh, and when I charge the battery it takes almost 2500mAh but when I use it yo charge my phone or something else it outputs only about half of the charge it took, around 1200-1300mAh. I wonder why is it so inefficient?
I bought also one of these before seeing your video. They are okay, but as you observed, the batt compartment is really short. The chip used does not accept both charge&discharge simultaneously.
I used a little hack that allows these things to accept protected cells so they don't go nuclear that easily. Remove the little pillar behind the positive contact with snips (including the tiny wall behind it) and flatten the contact with flat nose pliers (make sure not to snap the contacts or rip it from the circuit like I did). Now it can accept protected cells!
I have a question for you. Unfortunately I have one of them cheap China power banks the one I have has two batteries inside of it side-by-side it’s fatter and then one that you shown when I hook it up to the USB connector on my computer I have the red and the blue light flashing back and forth at the same time red blue red blue red blue red blue keeps flashing do you have any idea what this means?And apparently trying I was trying to play smart and they slapped her you know 10 sticker on the back I went to unit in this website they don’t make any of these power banks chargers of any kind.When I hooked up the charger power bank up to the iPhone the blue light does come on steady I guess that means is discharging but like I said when I charge it I have a blue and red light flashing back-and-forth. Thank you for your time any response would be very helpful.
Not bad for 80 cents, I would say. By the way, 1.5mH seems too high, maybe it is 1.5uH. These things operate at pretty darn high frequencies, 1.5uH seems more realistic. On top of that, you need a boat load of turns to get that inductance on this tiny core. Good videos, though, I didn't know they're down to 80 cents :)
Yes, it is really not so bad for the price :) except you have to have your own cell and there's no fuse in it. You are right, the inductor is 1.5uH. In the end of the video I've corrected the schematic :).
Sneaky, 9 seconds from the end :D I took off at 12:15 Yeah, the absence of a fuse is nasty. I use a very fine (0.08mm in diameter) magnet wire for that purpose, it pops above 3A. Not ideal, but works to protect from shorts.
I'm not really concerned for the absence of the fuse. You get a decent enough cell, something brand name rather than a China made one, and i mean if you harvest something out of an old laptop and i've seen fresh Sanyo cells for 2€ on nkon, it will have a pressure activated disconnect - if you ever get it hot enough to boil the electrolyte, it should detach before the electrolyte can catch on fire :D And it does have a built in short circuit protection in the controller IC at least for external shorts, though obviously not for internal ones.
Well it is cheap, and it appears to control the charging fine, so it should be safe :-). The boost converter seems to run out of steam, i would pay more for a better version, if i needed one. Is it possible the battery you used was a bit duff?
The battery was a good quality one, but it was quite old. The internal resistance may have been a bit higher due to a long storage. But anyway, I think that this powerbank is really good up to 1A, but sucks at anything higher.
I should say the cell is likely in very good condition, very low ESR! Otherwise, the power bank IC tends to run hot and explode in normal operation, like when charging or drawing half an amp, which is curious, because they claim that it has over temperature protection. It's recommended to install a ceramic capacitor parallel to the cell in case this occurs. In case someone fancies wading through Chinese language, i might have the datasheet somewhere on my harddisk, but i'm fairly confident that it has no mention of potential failure modes.
Tip. Lift the bottom edge of the battery before inserting. Also, this setup won't allow for much current. Your phone will shut off when the battery comes under load.
the problem of all those powerbanks is that they feature absolutely no fuse, so if the mosfet or bipolar transistor in the chip fails short circuit, the battery is going to explode if it has built-in no protective circuit!!!!
btw i used this to power a pi3b it works but it keeps rebooting so i installed a cap on the output that worked but the ic is still hot 79c when charging and 68 when being discharged.
Hi there, i recently enjoying and somewhat learn quite alot from your videos, even though i don't know much about electronics. If you don't mind i have this one question, that may actually has a simple answer. So i'm using this exact same cheap "DIY" powerbank, also the one who has 2 cells in it. The problem is, i hear a tiny volume of high frequency around 7 kHz from the single cell one, while the 2 cells version didn't make any sound. I can only hear it when i place my ear onto the plastic case. My question is, is this means there's a malfunction on it and can be dangerous at some point, and better be thrown away? I've quick tested the output voltage and it seems okay. Any answer will be greatly appreciated, Thank you and greetings from Indonesia.
Also wanna notice that this power bank doesn't have a reverse polarity protection and chip will blown up when try to charge it if you put battery in wrong polarity.
i ve build my own with one of those usb a and usb micro and 18650 soldered a switch to side of 18650 directly and run a wire to the module and then placed it all in a paper tube ( one of those that hold plastic bags ) and wrapped it with black electrical tape works great ngl cheap and easy to fix if it somehow breaks down
In your video you say it doesn’t have a fuse, please can you tell me whereabouts I can put a fuse wire? My circuit board is exactly the same as yours and has the same number on it TXT-XS-151224
Far easier on the negative side; just cut the long steel wire and insert a fuse or a really thin piece of wire (0.1mm is THICK, you need 0.07 for 1-1.5A)
Hi Diode, could you suggest way to make a backup power for ADSL router (power through)? It uses 9v, 0.6A. It won't work with xiaomi 10Ah powerbank, even though I tried it without, and with 3 types of voltage boosters. They just cant hold the voltage. I am thinking of buying two of this small bastards that support power through, and connect them in series, but I don't even know what kind supports being charged while they are charging the device, which is crucial for this kind of use. Xiaomi can do that, but I can't order one more, because reliable stores don't send it to my country anymore. I'm sure that a ninja like you have some solution for crappy problem like this :)
Wait who doesn't hold the voltage? The power bank turns off or the boosters misbehave in some manner? I suggest that it might be curious to tear down your router and see whether you might be successful powering it in another way - say if the input is a regulator to a lower voltage and 9V input goes nowhere else, you just dance around that and you're done. Depending on how the regulator is implemented, it might be fine with 5V input, but strain on components and thermal output will be higher, as they will need to pass more current - but it appears you have tried that and weren't successful. Another possibility is that the ICs and capacitors might take quite a bit more voltage if needed, and you'll probably find CCTV emergency batteries with pass-through that run on 12V. But we really need to see and probe around your DSL modem circuity first, don't just try - take it off the power and run continuity meter to see where everywhere the pin of the power supply goes inside the router, as it might be impossible to reliably determine visually, as it's likely built on a 4-layer PCB. Another thing to keep in mind is that you can use a step-down after the 12V battery if not certain. I don't anticipate that you shall be successful with two of these in series - i mean, they don't take kindly to being supplied more than 5.5 or 6V at the input, usually resulting in instant death, and there will be all kinds of border conditions. The MP3401A (and i got some power bank boards where the IC surface is unmarked that are the same) actually supports charge-through, but as you see, it doesn't take too kindly to being drawn a lot of current from, it's best under 0.9A at 5V, and your original power supply delivers slightly more power in total, considering conversion losses. What kind of duty cycle do you need to support? Is this for emergency use only, does the power come off only once in a while, or is it something that needs to hold you over multiple hours a day? I have a few more ideas on what to do, but need to determine the design parameters. As to something to replace the Xiaomi when you have to or get another equivalent device, well the problem is, Li-Ion batteries can no longer be easily shipped by air; however if you're in the civilised world, you likely have a local Anker distributor, and they also have power banks that support charge-through. Not that it will help you right now in this situation, but just mentioning.
Nope. Older powerbanks in this style use the MP3401, newer ones (like the ones I just bought for 1.59eur with "2600mAh" cells (tested about 750mAh)) use the slightly improved MP3501 which turns off at lower cell voltage of 2.65V rather than 3.1V of the MP3401, so it uses the battery more efficiently and runs for longer. The MP3501 also seems to be a bit smarter when charging "dead"/over-discharged cells. It'll try charging ANY cell connected to it with 30-50mA till the cell voltage reaches 2.85V, then it blasts it with up to 1A (if the USB source can supply it), slowly lowering charge current in 50-100mA steps till it's full. If the cell voltage doesn't rise to 2.85V (bad cell), it stays at 30-50mA for a while and then just turns off. I've actually stuck batteries scavenged from 8+ year old laptop battery packs into these MP3501 based powerbanks. The cell voltage immediately went up and they charged and revived just fine. The cells were light blue Panasonic CGR18650C rated 2150mAh that were sitting at 0.4-0.9V. They charged just fine, didn't get warm and after a few cycles measured between 1800-1900mAh. Not great but certainly better than the pointless 750mAh ones that came with the powerbanks. Plus they were free :)
I bought mine on ebay germany and the specific seller I bought mine from is no longer selling them because he got tons of negative feedback (rightfully so) for selling these as 2600mAh even though the completely anonymous (zero markings) 18650's in them turned out to be 700-800mAh. They were the generic brightly colored plastic case single cell ones like shown in this video, but the case was matte-textured (nowhere near as shiny looking as the one in the video) and the embossed "POWER BANK" and the text around the plugs is of higher quality (much clearer, as if the one in the video used a worn-out mold or crappy plastic for the case) I've personally seen those with 5 different controllers now. MP3401 and MP3501 (also clones labeled as SY3401/SY3501), Hotchip HT4928S (junk, turns off VERY early and just 800mA max output), XHR1808 and one with a PCB that is 100% identical to the one with the 3401 and 3501 chips but the chip is completely blank/no markings at all. Which one you get seems to be a complete gamble...
Bought one for 2 euros after half charging it I started smelling something burning and in less than a second, a circuit part behind the small USB exploded. I just used it less than 2 minutes with a 5volt Samsung charger
Da, si eu am cumparat mai multe modele, aveam o multime de 18650 de la doua baterii mari de laptop, cam 60% capacitate, si era pacat de ele. Am luat chiar un model cu 8 spatii, are 2 iesiri (legate in paralel) si reuseste sa scoata 2.1A (si are si 2 intrari de incarcare); a costat cam 4.2$.
#ff00cf Is my fav color Hi, This happened to my first one, but with an additional climax... the chip ruptured & gassed ! 😯🤓 It made a big hole on the top. I had to vent the entire room, because of that toxic gas. Be careful. 🤔😐😑
David Bolha i knew the risk that's why i took extra percussion when doing it . imagine when i flipped something or shorted something i would be in big trouble especially that my parents are strict when it comes to "home preservation"
One of those power banks burned down for me, it wasn't even charging or charging something. Just laying still on a table. I was lucky that I was home or the house may have burned down.
i bought a powerbank for 6 dinars that's almost 2 dollars and it had the same circuit as this one but 2 cells inside and only 1 was connected it was 1200 mAh cell the other was good and about 700 mAh ........i guess that circuit can only support 1 cell
Everything is fine except it has no protection for reverse polarity..... I connected the battery in reverse and the chip exploded :( ... it cost me $1 with the battery...
It doesn't have reverse polarity protection when inserting the battery, I found that out the hard way :)
Mine survived lol even though it emitted a lot of smoke
Mine put put a lot of smoke but... Didn't survive.
If u want it can still charge just remove the indicator of the circuit but u can't use the output usb port now. You can use the burnt up circuit by removing the indicator to charge lipo batteries
Inductor not indicator.
Emrldy same
These cost £1 from Poundland in the UK, and INCLUDE the battery cell. I have several and they are quite useful for powering small projects with 5V such as a "USB" powered audio amplifier.
It's like a portable 5v power supply
ಕನ್ನಡದಲ್ಲಿ ಕಳುಹಿಸಿಕೊಡಿ ಪ್ಲೀಸ್
@@ನಾರಾಯಣಸ್ವಾಮಿನಾರಾಯಣಸ್ವಾಮಿ fuikro
I bought two, two cell versions of these power banks and I used the westinghouse 18650 cells that are sold at walmart for the solar garden lights and I had to modify the case a little to fit the westinghouse cells but it worked and I actually use the power bank inside a radio that I built and the radio board connects straight to the battery (not the 5V out) of the power bank so it takes power directly from the 18650 cell and the radio works great. I charge the radio by charging the power bank.
1:43 that's what she said
😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂it’s really tight inside Jesus fucking Christ😂😂😂😂😂😂😂😂😂😂😂😂
LOL STOPKJBSV DAHKJVAH SVKJG SFDVHJK
So its a girl the man is boy not she
@@mkcaplayz6978 Lol please understand the meaning behind what mr. higorguedes441 said.🤣
You got a good one. I ordered 2. Both only supplied battery voltage, not 5V. One continuously lit the blue led. And the other had such a high quiescent drain it was not even any good as a rechargeable battery holder. Which is too bad, because the case design is actually very nice. I like the way the top clips in flush and securely.
Looks very similar to the power bank you can buy for £1 ($1.34 USD at todays rate) in the UK from 'Poundland' stores.
They come with 1200 mAh battery already installed and has max discharge rate at 1amp.
Great video. The power bank is not bad. I've soldered for my safety for a 2 amp. Fine fuse in the negative lead.
I'm not really into electronics, but these videos are really interesting. Keep it up!
hello! I bought one, but I instead of being operate by a spring is connected with wires, is there a way a can change to work as a 1865 battery charger? thank you so much
if you put to them some thermal disipation system it will work perfectly
I've got a lot of these (18650 cell included) leftover from when banks and other stores basically gave them away for whatever reason. You could even walk into a bank other than your own, ask about information, and they'd give you a powerbank along with the pamphlet!
I must say though, theyr're quite handy when you need to gt a lithium rechargeable battery for a project
I got 2 of them with the cell inside, but I didn't know that there was a cellless model
One is a green one and one is a blue one, I had won the blue one from some english contest thing in elementary school (the poster had a picture of a macbook and I would have been very happy if I had gotten that)
I also have one 4000mAh one with the low battery warning, and just recently I got a big one with 2 outputs, 2 inputs and the ability to charge my device while I'm actively using it
Im guessing that it would keep cycling the battery, if stayed connected to the power source and the load?
Like a simple ups?
"It's real tight, real tight inside"! Lol, that's what he said.
Btw. Love your videos!
You can buy those “power banks” at the dollar store in Canada where I live. I have the exact same one, but it’s pink; lol😀...Works great 👍😊
I have the pink one in PA and they work excellent.
@@kalebb9983 lol mine broke and I paid 10 € ...... lol
I think the power bank is designed for non-protected cell. As non-protected cells, do not have circuit board on the top, they are slightly shorter.
They sell these power banks in pound world with a battery for well 1 pound, if you live in the UK.
Gavin Davies True, but even these non-protected cells do have an interesting feature... it's called a CID (Current Interrupt Device). A little reading: batterybro.com/blogs/18650-wholesale-battery-reviews/18306003-battery-safety-101-anatomy-ptc-vs-pcb-vs-cid 😉😆
Gavin Davies do you get the battery along in poundworld?
I've bought one similar to this power bank, at the same price though.
I've put a brand new samsung 18650 flat top 2500mAh, and when I charge the battery it takes almost 2500mAh but when I use it yo charge my phone or something else it outputs only about half of the charge it took, around 1200-1300mAh.
I wonder why is it so inefficient?
I have the same board, but with two 18650 2500mAh batteries, and when charging the board goes extremely hot
Can you use a 18650 sodium ion battery instead of the lithium ion battery?
How can i increase the ampere of this circuit in order to make it to run 3amp.? Any help?
Simply replace it with a different circuit...
Jay Tee simply buy a better power bank
Not possible..simply buy another PB
@Nikunj bittu PowerBank
these are 1.50 euro with 1200mAh 18650 cells sold in Dealz in Ireland
She: what is it like?
Me: 2:02
I bought also one of these before seeing your video. They are okay, but as you observed, the batt compartment is really short. The chip used does not accept both charge&discharge simultaneously.
I used a little hack that allows these things to accept protected cells so they don't go nuclear that easily.
Remove the little pillar behind the positive contact with snips (including the tiny wall behind it) and flatten the contact with flat nose pliers (make sure not to snap the contacts or rip it from the circuit like I did). Now it can accept protected cells!
He forgot the disclaimer, that's why he didn't speak at the start
I have a question for you. Unfortunately I have one of them cheap China power banks the one I have has two batteries inside of it side-by-side it’s fatter and then one that you shown when I hook it up to the USB connector on my computer I have the red and the blue light flashing back and forth at the same time red blue red blue red blue red blue keeps flashing do you have any idea what this means?And apparently trying I was trying to play smart and they slapped her you know 10 sticker on the back I went to unit in this website they don’t make any of these power banks chargers of any kind.When I hooked up the charger power bank up to the iPhone the blue light does come on steady I guess that means is discharging but like I said when I charge it I have a blue and red light flashing back-and-forth. Thank you for your time any response would be very helpful.
Look into powerbank and change circuit
Considering all the missing components in this circuit and any poor design what should be the ideal circuit best for this type of product.
where did you get the USB voltage tester from? and how much was it?
Not bad for 80 cents, I would say. By the way, 1.5mH seems too high, maybe it is 1.5uH. These things operate at pretty darn high frequencies, 1.5uH seems more realistic. On top of that, you need a boat load of turns to get that inductance on this tiny core. Good videos, though, I didn't know they're down to 80 cents :)
Yes, it is really not so bad for the price :) except you have to have
your own cell and there's no fuse in it. You are right, the inductor is
1.5uH. In the end of the video I've corrected the schematic :).
Sneaky, 9 seconds from the end :D I took off at 12:15
Yeah, the absence of a fuse is nasty. I use a very fine (0.08mm in diameter) magnet wire for that purpose, it pops above 3A. Not ideal, but works to protect from shorts.
Where abouts did you put the piece of 0.08 wire?
I'm not really concerned for the absence of the fuse. You get a decent enough cell, something brand name rather than a China made one, and i mean if you harvest something out of an old laptop and i've seen fresh Sanyo cells for 2€ on nkon, it will have a pressure activated disconnect - if you ever get it hot enough to boil the electrolyte, it should detach before the electrolyte can catch on fire :D And it does have a built in short circuit protection in the controller IC at least for external shorts, though obviously not for internal ones.
I just gived advice to someone else on this thread to try with 0.07mm wire :D
Well it is cheap, and it appears to control the charging fine, so it should be safe :-).
The boost converter seems to run out of steam, i would pay more for a better version, if i needed one.
Is it possible the battery you used was a bit duff?
The battery was a good quality one, but it was quite old. The internal
resistance may have been a bit higher due to a long storage. But anyway,
I think that this powerbank is really good up to 1A, but sucks at
anything higher.
I should say the cell is likely in very good condition, very low ESR! Otherwise, the power bank IC tends to run hot and explode in normal operation, like when charging or drawing half an amp, which is curious, because they claim that it has over temperature protection. It's recommended to install a ceramic capacitor parallel to the cell in case this occurs. In case someone fancies wading through Chinese language, i might have the datasheet somewhere on my harddisk, but i'm fairly confident that it has no mention of potential failure modes.
Mmmmm, thanks very much for the tip! I didn't know, of course; i will apply your advice (i bought one of these)
how did you miss the fuse? Look at the board again bext to the B minus in lower left of board
I have same one with battery but its board get shorted now its board getting hot ..how can i repair it?
Sir can you please show me the solar charge controller circuit board. Which makes the voltage of the solar panels constant.
Hi, if a 18650 battery of 3.7 V has 3.000 mAh, how many amperes will it provide working in a power bank of those at 5,0 V?
thank you
Hey how can i fix power bank led 1
Buy new one. Costs less then one spare led
Tip. Lift the bottom edge of the battery before inserting. Also, this setup won't allow for much current. Your phone will shut off when the battery comes under load.
Ive got one of these for $5 from Kmart AUS 😂 but mine had a built in rechargeable battery
how many current you can draw from those batteries?
if the output gives you 5V 1A
what must be the input current if the battery has 3.7V ?
5/3.7*1 is ?
Sir please explain about ac peltier Tex1-12706. How does it work
I have the same 2200mAh power bank but it charges it from 0 to 20% then stops. How can i make the power bank charge my phone more in one go?
Please can you till me what is the name of the device which u r using to know the voltage and current
Can i connect multiple battery (parallely) to this circuit??
FREE FROM COPYRIGHT
I think it should work,but dont know the pcb specifiction
So dont try it,if you out of luck the pcb will burn out
the problem of all those powerbanks is that they feature absolutely no fuse, so if the mosfet or bipolar transistor in the chip fails short circuit, the battery is going to explode if it has built-in no protective circuit!!!!
Mine charged up to like 4.12V and stopped, is that normal??? And extremely slow charging from 3.6V to 4.12V in 6hrs.
bought one from Ebay, it flashes red/blue while charging. any idea why?
I was wondering If you could connect power banks in usb series to obtain 12V, 24V output is it too gone wild? Thx for your video :)
btw i used this to power a pi3b it works but it keeps rebooting so i installed a cap on the output that worked but the ic is still hot 79c when charging and 68 when being discharged.
Hi there, i recently enjoying and somewhat learn quite alot from your videos, even though i don't know much about electronics.
If you don't mind i have this one question, that may actually has a simple answer.
So i'm using this exact same cheap "DIY" powerbank, also the one who has 2 cells in it.
The problem is, i hear a tiny volume of high frequency around 7 kHz from the single cell one, while the 2 cells version didn't make any sound. I can only hear it when i place my ear onto the plastic case.
My question is, is this means there's a malfunction on it and can be dangerous at some point, and better be thrown away? I've quick tested the output voltage and it seems okay.
Any answer will be greatly appreciated, Thank you and greetings from Indonesia.
add a fuse
Also wanna notice that this power bank doesn't have a reverse polarity protection and chip will blown up when try to charge it if you put battery in wrong polarity.
i ve build my own with one of those usb a and usb micro and 18650
soldered a switch to side of 18650 directly and run a wire to the module and then placed it all in a paper tube ( one of those that hold plastic bags ) and wrapped it with black electrical tape works great ngl
cheap
and easy to fix if it somehow breaks down
Hey, where did you buy your usb multimeter? It's nice
www.amazon.com/USB-Charger-Doctor-line-Voltage/dp/B00S80CMBO/ref=sr_1_1?ie=UTF8&qid=1525600225&sr=8-1&keywords=charge+doctor
You can get it there.
In your video you say it doesn’t have a fuse, please can you tell me whereabouts I can put a fuse wire? My circuit board is exactly the same as yours and has the same number on it TXT-XS-151224
at between positive of cell to board positive
Far easier on the negative side; just cut the long steel wire and insert a fuse or a really thin piece of wire (0.1mm is THICK, you need 0.07 for 1-1.5A)
They should make the wire to the back terminal thin enough to function as a fuse...
Hi Diode, could you suggest way to make a backup power for ADSL router (power through)? It uses 9v, 0.6A. It won't work with xiaomi 10Ah powerbank, even though I tried it without, and with 3 types of voltage boosters. They just cant hold the voltage. I am thinking of buying two of this small bastards that support power through, and connect them in series, but I don't even know what kind supports being charged while they are charging the device, which is crucial for this kind of use. Xiaomi can do that, but I can't order one more, because reliable stores don't send it to my country anymore. I'm sure that a ninja like you have some solution for crappy problem like this :)
Wait who doesn't hold the voltage? The power bank turns off or the boosters misbehave in some manner?
I suggest that it might be curious to tear down your router and see whether you might be successful powering it in another way - say if the input is a regulator to a lower voltage and 9V input goes nowhere else, you just dance around that and you're done. Depending on how the regulator is implemented, it might be fine with 5V input, but strain on components and thermal output will be higher, as they will need to pass more current - but it appears you have tried that and weren't successful. Another possibility is that the ICs and capacitors might take quite a bit more voltage if needed, and you'll probably find CCTV emergency batteries with pass-through that run on 12V. But we really need to see and probe around your DSL modem circuity first, don't just try - take it off the power and run continuity meter to see where everywhere the pin of the power supply goes inside the router, as it might be impossible to reliably determine visually, as it's likely built on a 4-layer PCB. Another thing to keep in mind is that you can use a step-down after the 12V battery if not certain.
I don't anticipate that you shall be successful with two of these in series - i mean, they don't take kindly to being supplied more than 5.5 or 6V at the input, usually resulting in instant death, and there will be all kinds of border conditions. The MP3401A (and i got some power bank boards where the IC surface is unmarked that are the same) actually supports charge-through, but as you see, it doesn't take too kindly to being drawn a lot of current from, it's best under 0.9A at 5V, and your original power supply delivers slightly more power in total, considering conversion losses.
What kind of duty cycle do you need to support? Is this for emergency use only, does the power come off only once in a while, or is it something that needs to hold you over multiple hours a day? I have a few more ideas on what to do, but need to determine the design parameters.
As to something to replace the Xiaomi when you have to or get another equivalent device, well the problem is, Li-Ion batteries can no longer be easily shipped by air; however if you're in the civilised world, you likely have a local Anker distributor, and they also have power banks that support charge-through. Not that it will help you right now in this situation, but just mentioning.
Diode don't shutdown because u have protection on battery, this package is not too small, you used too big battery (the protection)
he said in the video that there is no protection circuit on the battery cell
Qual o nome desse aparelhinho que mede a voltagem
Isn`t it a TP-4056 chip?
Nope. Older powerbanks in this style use the MP3401, newer ones (like the ones I just bought for 1.59eur with "2600mAh" cells (tested about 750mAh)) use the slightly improved MP3501 which turns off at lower cell voltage of 2.65V rather than 3.1V of the MP3401, so it uses the battery more efficiently and runs for longer.
The MP3501 also seems to be a bit smarter when charging "dead"/over-discharged cells. It'll try charging ANY cell connected to it with 30-50mA till the cell voltage reaches 2.85V, then it blasts it with up to 1A (if the USB source can supply it), slowly lowering charge current in 50-100mA steps till it's full. If the cell voltage doesn't rise to 2.85V (bad cell), it stays at 30-50mA for a while and then just turns off.
I've actually stuck batteries scavenged from 8+ year old laptop battery packs into these MP3501 based powerbanks. The cell voltage immediately went up and they charged and revived just fine. The cells were light blue Panasonic CGR18650C rated 2150mAh that were sitting at 0.4-0.9V. They charged just fine, didn't get warm and after a few cycles measured between 1800-1900mAh. Not great but certainly better than the pointless 750mAh ones that came with the powerbanks. Plus they were free :)
Knaeckebrotsaege
Wow! Thanks for the information! :)
Can you send me a link about cheap 1x18650 power bank with MP3501 chip?
I bought mine on ebay germany and the specific seller I bought mine from is no longer selling them because he got tons of negative feedback (rightfully so) for selling these as 2600mAh even though the completely anonymous (zero markings) 18650's in them turned out to be 700-800mAh. They were the generic brightly colored plastic case single cell ones like shown in this video, but the case was matte-textured (nowhere near as shiny looking as the one in the video) and the embossed "POWER BANK" and the text around the plugs is of higher quality (much clearer, as if the one in the video used a worn-out mold or crappy plastic for the case)
I've personally seen those with 5 different controllers now. MP3401 and MP3501 (also clones labeled as SY3401/SY3501), Hotchip HT4928S (junk, turns off VERY early and just 800mA max output), XHR1808 and one with a PCB that is 100% identical to the one with the 3401 and 3501 chips but the chip is completely blank/no markings at all. Which one you get seems to be a complete gamble...
The same thing with batteries was shrunk by 300 yen at Japanese 100 yen shop Daiso.
Please can you give link of buying it please
what size battery
Bought one for 2 euros after half charging it I started smelling something burning and in less than a second, a circuit part behind the small USB exploded. I just used it less than 2 minutes with a 5volt Samsung charger
Tou were out of luck; it may hapen but usually they works; and price is 0.8-0.99$ on aliexpress
Adrian Andronache
Am luat una pt doua baterii (design similar cu cea pt o singura baterie) 4.5 lei.
Da, si eu am cumparat mai multe modele, aveam o multime de 18650 de la doua baterii mari de laptop, cam 60% capacitate, si era pacat de ele. Am luat chiar un model cu 8 spatii, are 2 iesiri (legate in paralel) si reuseste sa scoata 2.1A (si are si 2 intrari de incarcare); a costat cam 4.2$.
Is it dangerous?
Thank you!....We trust you opinion
So will this charge an iPhone
um dos melhores. otima explicação. muito obrigado.
I have 2600 mAh powerbank that costs about 2 dollars and 50 cents, but that's strange that he's automatically cut power when Im charging my phone...
what is the USB
Posli mi prosim link na ten powerbank ďiky
MDX Nation veď to nájdeš napr na heureke len napíš Power bank max cca2000mAh
alebo na Google
Squd i think they're asking for ten powerbanks link (where to buy them)
@@antkoos xd😂"ten" means "that" in this weird language
I have bought four of them with battery but two are not charging its battery and one doesnt output anything only one works perfectly
how to repair this Power Bank
I have killed many of those as it doesnt have reverse polarity. I use it to charge 18650's
Hey guys do you notice the ic heats up when charging.... Kinda need your feed back lol
#ff00cf Is my fav color Hi,
This happened to my first one, but with an additional climax... the chip ruptured & gassed ! 😯🤓
It made a big hole on the top. I had to vent the entire room, because of that toxic gas. Be careful. 🤔😐😑
David Bolha yeah i was scared i was going to kill my homemade PDA so i made my dad buy me a powerboost 1000c instead. thanks for the feedback tho
David Bolha i knew the risk that's why i took extra percussion when doing it .
imagine when i flipped something or shorted something i would be in big trouble especially that my parents are strict when it comes to "home preservation"
Try charging it with 1 amp insted of 2
One of those power banks burned down for me, it wasn't even charging or charging something. Just laying still on a table. I was lucky that I was home or the house may have burned down.
I have that one but its only 1 percent can charge it to my phone
i bought a powerbank for 6 dinars that's almost 2 dollars and it had the same circuit as this one but 2 cells inside and only 1 was connected it was 1200 mAh cell the other was good and about 700 mAh ........i guess that circuit can only support 1 cell
Everything is fine except it has no protection for reverse polarity..... I connected the battery in reverse and the chip exploded :(
... it cost me $1 with the battery...
I bought one of those in the us and it had a battery just like the one in the video and the little circuit board was dead
Great job man keep doing great video like this one
I'm buying one right now it's excellent power bank
But can you give a link where you bought it?
Bartosz Olszewski
I bought a case fitting two batteries. Also a pair of 3000mAh batteries.
I'm waiting to arrive to make myself a little powerbank. :)
Battery not charging please help me
Its probably good that its so tight. it would be bad if it would disconect when you shake it.
if I only want to regulate the 3.7V battery to 5V DC output, should I connect the pin 4 to the GND?
So wait basically you can charge those batteries? Right?.....
Why couldn't I charge Li-Ion batteries?
if you put the battery in the wrong way even for second these power banks break,i have done it a few times.
Very good review
Great video teacher
I bought one like one of these for $4.20 at my local dollarama and I couldn’t be happier it’s only *temporary* though
So cute 👍🏻👍🏻 🇮🇳 || Kuki 15|01|2022
I have this power bank
But this is so time for charge and then he give 1 hour only
to je frajer!strašně dobře mluvíš"!!
Огромное спасибо за информацию !
Love your videos!!
I got one for $3 with a 2600mAh battery and a cable.
bay link
80 টাকা বক্স আমি নিব কোন জায়গা থেকে নিয়েছেন
That protection on your phone....
ಬ್ಯಾಡ್ ಪವರ್ ಬ್ಯಾಟರಿ ಚಾರ್ಜ್ ಎಲ್ಲಿ ಸಿಗುತ್ತದೆ ಕಳುಹಿಸಿ ಎಲ್ಲಿ ಸಿಗುತ್ತೆ ಅದನ್ನು ಲಿಸ್ಟ್ ಮಾಡಿಕೊಳ್ಳಿ
hello sir,can we use battery with 6000 mAh
There's no 6000 mAh battery in 18650 size (not a real one).
It is not 0.11 ma it is 0.11amp or 110 ma diodegonewild
Meter is on the 20ma range so DGW is correct.
Great video! It mskes zero sence to have two decimals on a calculation like the one you made... haha
thats testing your wall charger put it on your power bank and charge
You can the exact same from poundland
But with a battery
That is good for Arduino systems