Cheapest Power Bank Review (with Schematic)
ฝัง
- เผยแพร่เมื่อ 2 ต.ค. 2024
- Test and teardown of the cheapest power bank ever - the 80 cent (incl. shipping) power bank from Ebay. Of course, you have to insert your own 3.7V Li-Ion 18650 cell into it :). What did you expect for 80 cents :)? It works well for loads up to 1A. At 1A the output voltage is 4.94V. At 1.1A the voltage drops to 4.56V and at 1.25A it shuts down. It charges the battery to about 4.2V and discharges it down to 3.1V. While charging, the power bank draws 0.78A from a 5V supply. Red blinking LED indicates charging. Steady red light indicates fully charged battery. Blue light indicates a load. When there's about 10% of capacity remaining, the blue LED starts blinking. The power bank is controlled by MP3401A chip and there are just few other components (3 capacitors, 1.5uH inductor and 2 LEDs). The battery space is little bit too short, but you still can insert the battery. The only problem is that there's no fuse in series with the battery. If the chip fails short, the battery will be shorted. In extreme case, this may lead to fire.
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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.🤣
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
He forgot the disclaimer, that's why he didn't speak at the start
Ive got one of these for $5 from Kmart AUS 😂 but mine had a built in rechargeable battery
"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
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.
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.
Great video. The power bank is not bad. I've soldered for my safety for a 2 amp. Fine fuse in the negative lead.
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
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.
I'm not really into electronics, but these videos are really interesting. Keep it up!
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.
She: what is it like?
Me: 2:02
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
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
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
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!!!!
bought one from Ebay, it flashes red/blue while charging. any idea why?
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
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)
these are 1.50 euro with 1200mAh 18650 cells sold in Dealz in Ireland
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
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...
Thank you!....We trust you opinion
Im guessing that it would keep cycling the battery, if stayed connected to the power source and the load?
Like a simple ups?
So cute 👍🏻👍🏻 🇮🇳 || Kuki 15|01|2022
I have killed many of those as it doesnt have reverse polarity. I use it to charge 18650's
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 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
those are -----junk. bought 3 and 0 worked. missing parts from the board.
to je frajer!strašně dobře mluvíš"!!
Love your videos!!
Can you use a 18650 sodium ion battery instead of the lithium ion battery?
The same thing with batteries was shrunk by 300 yen at Japanese 100 yen shop Daiso.
um dos melhores. otima explicação. muito obrigado.
where did you get the USB voltage tester from? and how much was it?
They should make the wire to the back terminal thin enough to function as a fuse...
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
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
ಬ್ಯಾಡ್ ಪವರ್ ಬ್ಯಾಟರಿ ಚಾರ್ಜ್ ಎಲ್ಲಿ ಸಿಗುತ್ತದೆ ಕಳುಹಿಸಿ ಎಲ್ಲಿ ಸಿಗುತ್ತೆ ಅದನ್ನು ಲಿಸ್ಟ್ ಮಾಡಿಕೊಳ್ಳಿ
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?
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$.
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
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...
cool. yours stayed on for more than 30 secounds.
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.
I paid $1 AUD including postage , now exact same item is $3-30 AUD , say goodbye to cheap Chinese goods.
Mine charged up to like 4.12V and stopped, is that normal??? And extremely slow charging from 3.6V to 4.12V in 6hrs.
80 টাকা বক্স আমি নিব কোন জায়গা থেকে নিয়েছেন
you can buy just the pcb. even cheaper :D
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
Lmao I have two of those you can get them in Pepco for cheap.
EDIT: Forgot to say that mines are rechargable. 😂
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?
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 bought one like one of these for $4.20 at my local dollarama and I couldn’t be happier it’s only *temporary* though
I got this at pound land
That is good for Arduino systems
I have this power bank
But this is so time for charge and then he give 1 hour only
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!
Огромное спасибо за информацию !
Is it dangerous?
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 :)
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)
Its probably good that its so tight. it would be bad if it would disconect when you shake it.
I have same one with battery but its board get shorted now its board getting hot ..how can i repair it?
I got one for $3 with a 2600mAh battery and a cable.
I have bought four of them with battery but two are not charging its battery and one doesnt output anything only one works perfectly
Please can you till me what is the name of the device which u r using to know the voltage and current
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
if you put the battery in the wrong way even for second these power banks break,i have done it a few times.
Considering all the missing components in this circuit and any poor design what should be the ideal circuit best for this type of product.
Sir please explain about ac peltier Tex1-12706. How does it work
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.
Sir can you please show me the solar charge controller circuit board. Which makes the voltage of the solar panels constant.
Argh! I got one of those about a year ago for $0.90. I was robbed!
btw i used this to power a pi3b it works but it keeps rebooting so i installed a cap on the output that worked but the ic is still hot 79c when charging and 68 when being discharged.
how many current you can draw from those batteries?
if the output gives you 5V 1A
what must be the input current if the battery has 3.7V ?
5/3.7*1 is ?
I bought one of those in the us and it had a battery just like the one in the video and the little circuit board was dead
Hey how can i fix power bank led 1
Buy new one. Costs less then one spare led
how did you miss the fuse? Look at the board again bext to the B minus in lower left of board
Great video! It mskes zero sence to have two decimals on a calculation like the one you made... haha
I have that one but its only 1 percent can charge it to my phone
i like this power bank cuz it's 4$ and by the way that's from dollarrama
i don't know how to spell that
thats testing your wall charger put it on your power bank and charge
how to repair this Power Bank
No problem for today😄
So will this charge an iPhone
Please can you give link of buying it please
not realy bad for 80 cents
Qual o nome desse aparelhinho que mede a voltagem
Battery not charging please help me
Great job man keep doing great video like this one
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
Very good review
That protection on your phone....
what size battery
You can use a 3400mah battery :D
yes
You can the exact same from poundland
But with a battery
It is not 0.11 ma it is 0.11amp or 110 ma diodegonewild
Meter is on the 20ma range so DGW is correct.