"DIY" USB Power Bank for 2x 18650 Li-Ion cells
HTML-код
- Опубликовано: 28 авг 2024
- Test and teardown of a PowerBank designed for two 18650 Li-Ion batteries. The sellers on Ebay call it "DIY" for a simple reason - it comes with no cells and you have to put your own 18650 Li-Ion cells into it. For just $1.19 including shipping its not so bad, but there's no fuse and no protection against wrong polarity.
WARNING: Batteries and power banks can catch fire or explode! Risk of fire, injury and burns.
You can support me on Patreon:
/ diodegonewild
My Instagram:
/ savage_danyk
Nice video! Thank you for taking the time to draw the schematic and explain the operation.
In fact, at least for me, it didn't blew up when I inserted the batteries in reverse accidentally. The battery went smoking hot at the solder got melted. But I managed to take it out on time and when I checked it later, it was working fine for my surprise!!
I like the DIY version more because you can put you own batteries instead of the cheap Chinese one with suspicious capacity:)
I had some laptop battery with reasonably good capacity cells. So I ordered a DIY power bank for 5x18650 and it arrived just in time for Pokemon GO craze ;) Definitely it was more useful back in the day when phones had smaller battery and Quick Charge wasn't a must. Now I roll with Xiaomi Power Bank 2, which today has the disadvantage of not having USB C.
*instead of the cheap Chinese one with suspicious capacity*
yeah youre probably right but wouldnt the boards on the diy powerbanks also be suspicious?
One funny thing about this DIY power banks is that if you travel to cities like Shanghai you actually can get one of these pretty cheap. I paid for mine only 2,62 Yuan which is around 0,38 US$
Meanwhile in the US, US ebay sellers sell them for $10 with no cells... XD
just got one off ebay for £1👍😎🇬🇧
you can find circuits of them for only 40 cents each on ebay by typing "134N3P"
@@Elfnetdesigns Sometimes it's worth it to pay more and get it in a couple days rather than pay pennies and wait months...
Yeah but how much was your airfare to Shanghai?
You can get the single cell power bank from Dealz in Ireland, Poundland in UK for 1.50 euro. I bought a few today for the 18650's for a project. They're using exactly the same charging board
he has already made video on those powerbank circuit..
damn.... i like your voice.... nice explanation
I had that single battery one, and it blew up at the first run itself. I was testing it before making a video about it. I placed a fully charged battery and used the test load and bang! The chip went on fumes. May be a bad solder, idk.. But I didn't caught that on camera.
On TXT-XS-151224,The Chip is MP3401A
I decided to buy a 4xAA version, which I'm curious to see how well it performs and its efficiency. Like this DIY kit, it also has a micro USB input to recharge Ni-MH batteries.
Thanks for the video.
Tank you very much you are the best
Those chips are everywhere, they have been in most banks i have bought over the years, they're pretty good.
Converted one of mine into a 8×18650 charger:)
Just so you know, the step up converter is cheap and nasty. I've tested mine, 2200mah goes in, around 1,200mah comes out. nearly 50% of it gets lost.
nice video, thought the accent very weird, yet no one mention that. good job
I have been using these from ebay for a couple of years and they are still working. The main problem is rust from the metal connections.
I got one and it has a hissing sound, I thing the operating frequency is in the audible range, I haven't measured with a scope yet to see if the output is stable but it seems to work anyway
Good review. Excellent reverse engineering on SMPS videos. 8-)
Hi Dan - This seems to be one of your more popular videos, any chance you could make a step-by-step video adding the fuses to fail-safe these $1 power banks?
Your voice and accent is too sweet.😁😁😁
Not bad! I could buy these just for charging up my 18650 cells via USB - as USB power from a PC (0.5A?) should be more than enough to charge them :)
And I always check to make sure I put them in the right way :)
Yes, those are good as chargers :). Much safer than the mains ones with very dodgy isolation.
Nice interesting video as usual. Please what fuse is supposed to be used for the upgrade? Thanks
Good hit 👍🏻👍🏻 🇮🇳 || Kuki 15|01|2022
Well I bought some of these. Turns out the 18650 cells I had in mind are garbage. Just salvaged some LiPo cells from a laptop battery I might use this with.
Bruh, I think this guy's Count Chocula...
I have bought one of this case and 2 x 3000mAh batteries.
You think it will recharge a 3000mAh phone battery at least one full cycle?
And the speed of charge it is same as when charging from a wall socket or much slower?
Thank you.
I have the same power bank and am interested in adding fuses. Can you create a video on adding fuses including what fuses to buy?
I may make a video on it in the future :). I would probably add a fuse in series with each cell. About 2A or 2.5A would be OK. Fast or slow, any fuse type is much better than nothing :).
The fuse physical size would need to be very small. Is there a specific type that you recommend?
CONNECTOOOOOOORR, NOTHIIIIIING, GROUND PIIIIIIIN XXDDD
Some of them drain the cells with no undervoltage cutoff, the there's no fuse or current limit just voltage dragged down and the tend to charge your cells to brink of fire...I don't like them with low prices for ready powerbanks as low as 5€ with 2x god 18650 inside. Thank you for your reviews
I have never seen a powerbank with no undervoltage cutoff (so far).
Hy can you please tell me what is the name of ebay seller you both cheap good full capacity 18650 cells from ? I need some cells for project.
Hello, I've bought a pair of cells for 3usd including shipping from seller named chaconne66 and they were around 2400mAh, but I can't guarantee he sends the same type to all buyers.
DiodeGoneWild thank you I will try and see what happends :)
Wait, so the 5000mAh batteries I got for $1.94CAD each _aren't_ real? 😲 Chinese sellers sell fake stuff? 🤯
I have one of these serving as a battery in a radio project I made but the batteries are junk. The power bank is similar to yours but the batteries are welded together and soldered in and I have the radio running directly off the 18650 cells and not going through the step up circuit which would interfere with reception. I saw these on amazon but I'm looking for one WITH cells. I have some westinghouse 18650 cells but they might not fit in this.
Diode, what size of fuse would recommend fitting? F 1 amp or F 2 amp.
well, judging from the power bank, it just 1 amp.
Can be min. 2A. Must be 3A. Because 5W output. 5W/3V(min battery voltage)=1.6A But dont forget losess.
Now I have a use for all of those salvaged laptop batteries that don't have their full capacity anymore. Test the USB powerbank for true battery capacity and set a price accordingly to sell to friends.
you could use this on a constant charge with usb led as emergency light
Late comment but I did that check
Out my past videos of you can
Hi, I like your videos. It'd be great if you can give the link to the products.
ebay.com/sch/i.html?_nkw=diy+power+bank
Take your pick; they're all the same cheap junk. There's thousands available from hundreds of Chinese sellers (though most of them are the same few sellers, using multiple accounts and names).
so when we charge it blinks red light and when full charge full red light ..
1.2 dollars for a usb charge circuit and a project box? Where do I sign up?
Chinese Ebay
aliexpress
ebay aka the silk road
If anything, the case is the most valuable part. There are also 18650 "holders" for cheap, but this actually encloses them nicely. The circuit is junk; you can get a much better one on eBay for under $1 and swap that in.
Thanks but I havea question when I was charging my powerbank it blink red and then blue and then red and then blue light.... I dont know why.. Please help me
Same problem. I do not know why.
i guess you have a defective unit. if i were you i would just play it safe and get a powerbank from a well known company like anker
Is this USB power bank charges mobiles phone??
Yes
On the one battery round one I did put the battery in wrong and killed the power bank and phone when it was plugged in.
Hi, at the end of the video, you mentioned about adding fuses to it, may i know what kind of fuse and rating should be used? Can you show one that you have modified with added fuses? Thank you very much!
I'm sorry for the late reply. You should put fuses in it (2) one between batteries and one between batteries and chip. That's because if one of the cells goes short, it will heat up other one a lot and may even explode (very small chance because batteries now have CID). And if chip goes short circuit or you put it in reverse, you won't destroy them.
@@pavelbires hi.but what type of fuse?
@@michaelsrowland you can use glass one or the ceramic one, I would prefer fast 4A fuse (F4A).
or 2.5A slow fuse (T2.5A)
@@pavelbires how do you put one between batteries, there is no room
Thank you. IC can be IP5305.
Can i remove that blue light? That's very² distract me
You should show the efficiency of these usb power banks they are real bad .
Agreed i made today and mobile is charging very slow 1 % in 4 to 5 min
thx nice explanation sir
I dont think any of my power banks has a fuse or reverse polarity protection, not even the more expensive branded ones
yeme the DIY Tomo M4 Powerbank has a reverse polarity protection. Only problem I’ve encountered is that it drains your batteries even when not in use.
What is reverse polarity protection
Thanks
Hi sir I had made the same power bank as u made in this video but problem is that it is charging but it is not showing the charging level after when I cut the Supply of charging .What is the problem?
great vid!
konečně dělají na dva články. hned dvě objednám. ty jednočlánkové sou naprd, malá kapacita
Oni už je nejspíš dělaj roky :). Viděl sem tam dokonce i na 6 článků.
Question:
While charging the bank over night, could I also connect the bank with my iPhone, and that my iphone is charged at the same time?
No you can’t, only the powerbank gets charged not your phone
Nice but the charging chip may be getting overheated.
Can you use instead 2 sodium ion batteries?
i would like to know how long would it take to charge an iphone 5 from this device and how long to recharge
What about the protector ? Is there any protection beside cut off at full charged ?
Hi, im trying to re use some 18650 from notebooks batterys. I think that the chip of that power bank is 134N3P How much batterys can i put tho this in parallel? Thanks
I have like 6that kind powerbanks and few of them disharged totaly flat my batteries to death and chargig sometimes show strange blinking lik blue/red not jus simple red blinking to me it looks like trash try to use it for like 5 times
good day sir... what is the type of fuses can we use for the battery and what value?
How can we connect it 3W 6v solar panel using 2x18650 lion 3.7v
I have some of these that only put out 3.3 volts..........any idea why and how to fix?
there's two key chains because ones for left handed people and the other is for right handed people..dah
That ic name is CT6201
I had to crush the positive contacts on my powerbank as the 18650 cells I received were slightly too long to fit
What does it mean if the leds are blinking red then blue
I like 'DIY' usb power bank
thank you
can you connect it to a micro action camera? how long will it last?
Too bad it doesn’t have a reverse polarity protection, well the one I have doesn’t.
Neválí se Vám jedna plonkova na ty 2 články doma? Nebo možná by stačil i ten usb charging, discharging board :)
Does it heat up until the battery is completely charged? in my case yes :/
How much time it takes to recharge the batteries?
@@basiljose1526 More or less 3 hours which is the recommended time
@@630NESS 2-3 hour for 2 parallely connected batteries?
@@basiljose1526 oh sorry, it must take 6 or 7 hours with that chip
Hi do u have link for the diy usb power bank case I found them on aliexpress
I've bought them 6 and half years ago...
cool just got one off ebay for £1🇬🇧😎👍 got spare laptop battery to pull apart and use with it!!
You have broken second blue LED..
Great, but if I want to improve the ampere then plz.
which chip could it be or which one could you replace it with?
Use 12 battery to connect in parallel connection 18650 battery pink and color blue don't use other color only pink and blue
Ace Mark Fernandez What would pink and blue have to do with anything? It's just wrap colour. Are my brand new genuine Samsung 18650's (green) no good?!
what is the fuse capacity you suggest for those batteries ?
Total series fuse must be 3A.
Can you fully charge the vape battery in it?
Hi Sir! Great video! I also have the same battery case. But in mine, the blue led is always steady on even without load. And when I charge it, the light is still steady blue, not blinking red. Do you think I have a defective unit?
Hi, I am trying to make a 1 cell compact power bank using one 18650 cell, but can I use one power bank module for 1 or more cells ?
You can use more then one 18650 in parallel. More in parallel also means longer charging time.
Sir i purchase this product. Plz give me link
Maybe a 4550 or 5450 circuit in 5v out 4v out 5v gnd 0v
I want the link to buy that
is it able to charge 6 batters in parallel connection if i make other box .please.. or what the max of battery i can charge in one circuit.. thank u
You can but the charging time will now be more. Also make sure all the batteries have the same capacity.
• I have one of those, but mine didn't have a keychain. They probably put it in yours, which is why you have two. "Quality". ¬_¬
• "DIY" because it doesn't come with batteries. 🙄
• You should test its output with a DMM. The USB volt-meter says 5V, but a DMM says 3.8V.
I have fried one but the chip just smoke no more then that
Are you Borat's brother?
So how many mAh did U have?
you sound so sarcastic thanks
From where we can buy this
Nice
What type of the chip?
If I want to load the bank during the night, can I connect my phone also, so that both are loaded at the same time in the night?
no
Can we use lithium silver battery rather than this??
Do they say on them that they're rechargable?
Can i use 3.7 volt three battry?
Can i use 3.7 volt three battry?
What is the full name of this module
DIY power bank
134N3P
How can buy batteries
How much time it took to full charge two batteries ?
How much did you? 2 hour I guess
Got 1 from ebay for $1 Salvaged 6 cells from a NEW laptop battery i bought for a laptop i never used after scavenging the HD to repair a better one.
BOUGHT 10 of these been having problem to find the battery......I searched the chaconne66 cannot locate it......is there another seller that I find these battery....made a mistake buying the charger due to I thought there is battery inside......some searched said only for vape/flashlight & etc......I need 2600mah 3.7 .....need help anybody. thanks
Just go to a local laptop repair shop and ask for a defective laptop battery and pull some good 18650s from it. You need to test for voltage first. I would pick anything that's above 3V. Their is a lot of videos on RUclips that shows how to get some from a dead laptop battery.
Thanks for expanation.