Introduction: USB Power Bank

Welcome to my instructable!

Today i will show you how I made USB Power Bank.

It holds anywhere to 7000-16000mAh ,which depends on batteries you'r using. Capacity for C type batteries

This small device can be used to power any small gadget which use 5v USB input like those small rc quad copters and rc cars.

Module i'm using is USB step-up booster ,which boosts anywhere form 0.9V ~ 5V and can output stable 5V dc voltage. This will not charge your phone! For that application please use different kind of module.

Anyway back to project!

Step 1: Parts

Picture of Parts

Step 2: Preparing Parts and Project Box

Picture of Preparing Parts and Project Box

I started by modifying battery holder and project box to fit each other.

Then i placed parts in project box and arranged them in order which they fit best.

Step 3: Soldering

Picture of Soldering

Soldering is pretty straight foward.

Just solder positive to positive and negative to negative ,just remember to add switch between one of those wires so you can turn power bank on and off.

Step 4: All Done

Picture of All Done

After soldering all parts together you can put in batteries and close project box and your done!

This is how my project turned out , I'm pretty happy with result and it definitely dose what it's made for.

I hope you'r will as well!

Thanks for reading my instructable!


DanielB770 (author)2017-08-28

would I be able to use a double a battery pack instead?

KlarikaC (author)2016-04-08

I have a 10,400mah in the first place I full charged my power bank, after 3days when I plan to used it my power bank isnt turning on.. the lights dead.. I try all the possibilities and way but I failed

Nmoleo­ (author)KlarikaC2016-09-16

You can't chargen D batteries, you probably destroyed them...

KlarikaC (author)KlarikaC2016-04-08

Pls help guys

Mediadaha (author)2016-06-12

wow,, i like this article.

Syashp (author)2015-11-12

I have A power bank of Mi 10400mah it doesn't in working condition.But I have 2 batteries of 2500mah how can i use it.

gary.reardon2 (author)2015-05-09

Would this power a raspberry pi

DIYByKev (author)gary.reardon22015-05-10


FanisS (author)DIYByKev2015-05-11

No !!! Rasberry pi needs min 1000 - max 2000 mA to work fine !this psu give 600mA . Maybe works but not as could

WhiteRenard (author)FanisS2015-10-10

I use a 850mA usb charger for my RPi and it works fine with a wireless keyboard connected and ethernet port.

Aron Rc RC (author)2015-05-20

Hey dude,
I made it ,it fives good result,
I can,t charge my phone.
!!!!!!!!!! what is the reason !!!!!!!!!.

Speedadventure87 (author)2015-05-17

would this power a htc m7 ?

if no, why ??

JrDeveloper (author)2015-05-04

dose it work on phones?

It should. If it spits out 5V. Most phone chargers are 5V @ 500mA. The boost regulator says 600mA and it has a performance of approx 80 - 85%.

There's of course the problem of batteries but from what I gather from this:

These batteries are capable to spit out enough current to drive the boost regulator at it's 600mA peak. So it should work with most if not all normal phones. In case of an iPhone and other such Satanist worship artifacts, I think they don't care for standards much (or they break them intentionally to sell you more stuff) so I can't guarantee.

Found this.

Apple is pure evil. Customers should not put up with this nonsense. Anyway, if you want an apple thing, add these resistors and you're good to go.

PS: Add how much battery power you want, provided you keep the voltage below 5. A boost regulator only drives voltage up. You could literally provide your phone with juice for a month or so if you plan a long trip or something.

I did try out it on my Iphone 5c or as you may recognise as Satanist worship artifact xD and Nokia Lumia 520 And believe it or not they did not charge.

On Iphone it didn't work cause of those resistors you mentioned earlier or as I call their function - providing data signals, but i see no reason why it didn't work on my sisters Lumia ,But that may be because i used used batteries for this project.

I don't get why people these days care that much about other's stuff. At least I go for most appealing design which is closer to my taste.

Anyways thanks for your comment ,it really made my day, at least that par about ,,In case of an iPhone and other such Satanist worship artifacts''

I apologize. I have a weird sense of humor. I too own a mac and an iPhone. It's just that they don't adhere to standards that annoys me.

brzi420 (author)DIYByKev2015-05-07

Lumia (and most of the non-apple prdoucts) might charge if you just put a 47ohm resistor between USB data pins

manxm (author)JrDeveloper2015-05-05

I'd say definately - iPhone anyway. They are all 5v.

DIYByKev (author)manxm2015-05-05

But did you know that iphone dose not charge by only 5v input?

It needs resistance at data ports too, without them it wont charge

zappenfusen (author)2015-05-07

Encouraging to know the stuff on E-bay is not all highly suspect.

CurtR (author)2015-05-07

A circuit drawing would be helpful. Can you provide one?

kjn4685 (author)2015-05-07

Good job. I can see a few uses for this.

farticus (author)2015-05-05

I am interested in making something like this with a solar cell in the top and a charger board. With the ESP WiFi modules being so cheap you could even have it remotely tell you if it had finished charging without you having to go outside to check it yourself. Add a few sensors and you also get a simple weather station for next to nothing.

GJ_Token (author)2015-05-05

A redesign using super capacitors to store the charge could be interesting

farticus (author)GJ_Token2015-05-05

"They are however 10 times larger than conventional batteries for a given charge."

And they discharge much faster. But if you need rapid and repeated charge discharge cycles and the above issues do not matter in your application then they are ideal.

MichaelAtOz (author)2015-05-05

I take it these are primary cell batteries. Adding a USB charge feature for rechargeable NiMH would be be a good next step.

stephenmack (author)2015-05-05

Great instructable!

MukundanVChariar (author)2015-05-03

Could you make another instructable to modify this to be able to charge a phone

It should be able to charge a phone as is. Just get a usb plug for your phone.

I'm already thinking about it ;)

BlueRobot (author)2015-05-03

So simple! Great instructable! Will probability make some version of this:)

MukundanVChariar (author)2015-05-03

Pretty good

About This Instructable




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