Introduction: Convert Your Old Laptop Battery Into a Power Bank

Picture of Convert Your Old Laptop Battery Into a Power Bank

In this project I will show you how to convert a battery from an old laptop into a power bank which can charge an ordinary phone 4 to 5 times with a single charge. Let's get started!

Step 1: Watch the Video!

The video gives you a basic overview which steps are necessary to create your own power bank. But I will present you more detailed information in the following steps.

Step 2: Buy the Necessary Components!

Picture of Buy the Necessary Components!

Here is a list of parts you will need for this project:

1x TP4056:

1x Micro USB Breakout:

1x Toggle Switch:

1x XL6009 Boost Converter:

1x 5mm Red LED:

2x 5mm Green LED:

1x 2.2kΩ Resistor:

1x Female USB Port:

1x TP4056:

1x Micro USB Breakout:

1x Toggle Switch:

1x XL6009 Boost Converter:

1x 5mm Red LED:

2x 5mm Green LED:

1x 2.2kΩ Resistor:

1x Female USB Port:


1x TP4056:

1x Micro USB Breakout:

1x Toggle Switch:

1x XL6009 Boost Converter:

1x 5mm Red LED:

2x 5mm Green LED:

1x 2.2kΩ Resistor:

1x Female USB Port:


1x TP4056:

1x Micro USB Breakout:

1x Toggle Switch:

1x XL6009 Boost Converter:

1x 5mm Red LED:

2x 5mm Green LED:

1x 2.2kΩ Resistor:

1x Female USB Port:

Step 3: Time for the Wiring!

Picture of Time for the Wiring!

Here you can find pictures on how my wiring looks like. Simply recreate it inside your case and everything should work just fine.

Step 4: Success!

Picture of Success!

You did it. You just converted an old useless laptop battery into a power bank.

Feel free to check out my YouTube channel for more awesome projects:

You can also follow me on Facebook, Twitter and Google+ for news about upcoming projects and behind the scenes information:


HM1522 (author)2016-02-17

My charger doesnt have the out terminals, it only has the input and bat terminals. What to do?

zapperken (author)HM15222017-11-16

look for TP4056 with protection, they have 3 ICs and has two more terminals (out) adjacent to the battery terminals.

Buy the latest version taht looks like this:

ΘοδωρήςΚ1 (author)2017-11-07

Hi, i made this project. But i have little problem , charging port gives only 0.5A , how can i boost it ? If i can .

giriraghu7 made it! (author)2017-09-28

Awesome project. I did it too! Just need to find a box to enclose

Simon_r99 (author)2017-09-16

I have a Problem! One of the 3 pairs is ~1V lower than the other 2 (~3,33, ~4,5 & ~4,6) Can I still use all of them?

PardeepK11 made it! (author)2017-08-23

Awesome Project :)

makeosaurus (author)2016-01-31

Could you use this to power a raspberry pi 2? What amps does it supply?

Up to 3A

Sonsoer (author)GreatScottLab2017-08-16

1,2A... the max output current of the protection board is only1200mA

NicolásL85 (author)2017-08-07

Hello. I made the connections like this (tested 5V at output), and my cellphone wont turn on after that (it died basically). I suspect there was current overflow. Any ideas if I definitely lost my phone? Is it worth to buy another battery or any other component that might have burned?

jmbradbrook (author)2017-06-20

Hi, just wondering if the TP4065 is supposed to get hot when charging batteries, the red led lights but I unplugged it when it started getting hot. I am using 13mm² wire and genuine Samsung 2600mAh 18650 lithium cell. Thank you.

jmbradbrook (author)jmbradbrook2017-06-20

Oh, I am also using 3 of these cells in parallel, which were also in parallel in the laptop I salvaged them from.

shivakumar1995 (author)2017-04-08

I made it and it works well. but i want to know how i can draw more current out of it to charge it faster.?

Umarw2 (author)shivakumar19952017-05-25

where you get the case?

arturo.briceno.148 (author)2017-05-10

Hi, how long does it take to have the full charge?

jbsps6 (author)2017-05-06

Can I add multiple USB ports?

IvanŠ187 (author)2016-10-18

Coud i use my old tablet battery it has 3.7v and 4800mAh?

GreatScottLab (author)IvanŠ1872016-10-19


xplorelabs (author)GreatScottLab2017-04-12

Bro how many amps does it give as output to mobile phone ?

IvanŠ187 (author)GreatScottLab2016-10-20

Omg you answerd me

If you will read my comment again i want you to know that you are awsome and i love your videos
And thank you :D

AlbertZ8 made it! (author)2017-03-23


I want to add LED's but I dont have 2.2k resistor.

I have only 220,1000 and 4700. If I add 1000 + 1000 + 220 would it approximately work like 2.2k one?

Ps. Except the LED's everything is working. Thanks Scott <3

MRskrympy (author)AlbertZ82017-03-25

cant u just buy a 2.2k bcs that will mess up a lot of ur cables

LierezT (author)2016-12-12


can i use the battery while i am charging it?
i want to to make a portable Bluetooth speaker with an old speaker i have and i want to add this battery to power it up.

thank you

LierezT (author)LierezT2016-12-12

and another question:

does the xl6009 boost converter can make it to output about 12 volts?
my bluetooth amp is TDA7492P and it works with 8~24 volts.

i will pass the usb out port and connect the battery straight to the amp.

thanks again

Yes, the booster can output 12 volts


There is some circuit like the TP4056 that can handle 12v?

thank you!

Lachlan40 (author)2017-02-03

Also if I added a solar to charge it could i just wire it into the batteries.

Lachlan40 (author)2017-02-03

Hi Scott I was wondering before I made this if I can recharge the batteries and if I can how so.

КО РЕЧИК (author)2017-01-15

hi from where i can find this box sorry for my bad english

cole_hall_ (author)2016-12-14

hey GreatScottLab what gauge wire did you use?

ddaemi (author)2016-12-10


How would i go about charging the laptop battery as is, because the one i have has the right properties for my project but i don't want to put it in the laptop every time i need to charge. What can i do?

Bahno (author)2016-11-24

And sorry for my English...

Bahno (author)2016-11-24

I have got battery from laptop, and this battery is: SF US18650GR

T G5149OD06J.

I can´t find the informations of this battery. Where I can to find it?

I don´t know, if this battery from laptop acer is somewhere...

Thank you!

Youngtinker0713 (author)2016-11-12

Hello i was woundering where the case came from thanks. (Sorry if this question is dumb but im new at this)

yosuko (author)2016-06-02

I have one question regarding the power bank what if the phone is fully charged and still the phone getting power won't it damage the phone.

aschoots (author)yosuko2016-09-17

No, if you leave your phone in the wall socket when it's charged it won't be damaged either, and phones also have protection circuits

aquamammal (author)2016-09-16

Hi, are you using 2.2 kohm resistor?? Isn't the band color red red red? Why is your resistor different?

serwsqu (author)2016-09-03

Hi, i made this project. But i have little problem , charging port gives only 0.5A , how can i boost it ? If i can .

Andajus (author)2016-08-15

Hey, good work! But still I can't figure out why do You use usb break out board while there is the same usb connector on the charging board... Why is that?

FlorianF14 (author)Andajus2016-08-15

Hey !

Some charging board are mini usb and not micro usb, if you want to use your phone charger to charge the power bank you will have to add a usb breakout :D

Andajus (author)FlorianF142016-08-16

So IT isn't the same connectors... Thanks, I didn't notice :D

LigerBlue (author)2016-06-24

Great video , I do have a question although. I have a 11.4v 3780 battery pack scavenged from a dead laptop ( motherboard fried due to liquid spill on keyboard). These are the flat batteries we see in cell phones. A battery like this should be fine for this circuit or should I be adjusting anything? I will be adjusting the boost converter to put out 5v

that should be fine, it won't be able to give as many charges since yours is only 3780mAh but it should still work

LinasG3 (author)2016-08-08

Can you use bateries bought by one in series for this project?

KeystoneScience (author)LinasG32016-08-14

yes, however in series would not let it be able to supply as much current, and since we are only going for 5v there isn't much insentive I would say ( unless you want to skip having a boost dc converter ) but as long as you don't get do much voltage everything should be fine!

SamC161 (author)2016-08-06

Hello Scott, a great fan of yours, but I was wondering if there is any way to transform any of this current into higher / lower values, and if you could tell me how, / direct me to something that tells me how to. Thanks again, and great job keeping up with everybody on instructables btw

KeystoneScience (author)SamC1612016-08-14

sorry, I'm not the great Scott :D but I may be able to help you. First off, normally on the boost converter where he changes it to 5v there is a pin usually where you can adjust the current you desire, however even if yours does not have this, you can always attach a potentiometer to the output of the boost converter, and using the potentiometer the current will change based on what you set it to

Hope it help!


sreeci (author)2016-03-23

Hello Scot,

Once again thank you for all your fantastic projects, especially your descriptive descriptions on every aspect, every theory, turn by turn.

Regarding the Laptop PowerBank:-

Some engineers, remarked that the PowerBank did not charge Apple devices, viz: iPhone/iPad mini etc.

Some commented to add 2X10K on Data lines.

i did not see a response from your side. Perhaps, you must be busy with ever so many projects in your agenda and your mind. That's appreciable.

When you get a little bit of time, please explain elaborately, as to how the above issue can be overcome.

Thanks once again.

About This Instructable




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