Convert Your Old Laptop Battery Into a Power Bank

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Introduction: Convert Your Old Laptop Battery Into a Power Bank

About: Awesome Electronics Tutorials, Projects and How To´s

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!

Step 3: 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!

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:

http://www.youtube.com/user/greatscottlab

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

https://twitter.com/GreatScottLab

https://www.facebook.com/greatscottlab

8 People Made This Project!

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141 Discussions

0
littlelake
littlelake

Question 3 months ago on Introduction

hello.
pls at what voltage will the boost converter cut off...to save the li-ion cells from over-discharge?

0
nslab
nslab

Answer 5 weeks ago

Hello.
TP4056 battery charger module have auto cut off feature with DW01 ic ,when battery voltage is reached to 2.7v ,automatically battery will be disconnect from circuit. again battery is connected to the circuit after it will recharged
i hope you understand my answer .

thank you.

0
littlelake
littlelake

Reply 5 weeks ago

perfect, thanks alot

0
LierezT
LierezT

3 years ago

hi,

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
lierez.

0
LierezT
LierezT

Reply 3 years ago

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

0
Creation Zone
Creation Zone

Reply 3 years ago

Yes, the booster can output 12 volts

0
garzo
garzo

Reply 1 year ago

It can, but the current will be limited by the TP4056. With FULLY CHARGED BATTERIES you will have no more than 400mA @ 12V. When the cells are about to be empty you will only have less than 250mA. Not enough for a bluetooth speaker in any case...

0
LierezT
LierezT

Reply 3 years ago

Hi,

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

0
LierezT
LierezT

Reply 3 years ago

thank you!

0
ΘοδωρήςΚ1
ΘοδωρήςΚ1

2 years ago

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

0
garzo
garzo

Reply 1 year ago

If you are using more than one cell in parallel you shouldn't have any current limit from the cells, then it should be the TP4056 with its 1.2A of maximum output current. 1.2A @ 3V should be converted in 0.72A @ 5V, but you have to take into the equation the efficiency of the dc converter. Afaik with these components you can't increase the output current...

0
SaugandhikP
SaugandhikP

2 years ago

What if 18650 batteries got over discharged? Is there any protection circuit for under voltage protection? It will be harmful for the batteries. So what circuit should i add to get over discharging protection?!! Please help!

0
narena
narena

Question 2 years ago

Output of charger module 4056 has twp plus and Two minus. One plus and minus which is inner one is connected across batteries..while outer plus and minus is connected to boost input using switch.. Outer and inner positive connections are shorted .. is this true for inner and outer negative connections too ? Its not shorted in my module I got but both positives are shorted though .....comment

Capture.PNG
0
JoseC507
JoseC507

Question 2 years ago on Introduction

Hello, I have an inquiry, can I replace the TP4056, and both the micro-USB breakout and female usb port with this? (refer to image) I got it from an old power bank that was lying around the house. I was wondering if I could skip it and be okay with going through hooking it up with the boost converter.

IMG_20180222_190302.jpg
0
rtrzewikowski
rtrzewikowski

2 years ago

Pretty cool setup and worked pretty well until a point.
Either the TP4056 or the stepup converter started acting up after the batteries drained completely and on the USB output I was getting 19V (and I was not able to adjust it anywhere below 18V)!

0
HM1522
HM1522

4 years ago

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

0
zapperken
zapperken

Reply 2 years ago

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

0
Creation Zone
Creation Zone

Reply 3 years ago

Buy the latest version taht looks like this: https://goo.gl/OotPh6

0
Simon_r99
Simon_r99

2 years ago

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?

0
makeosaurus
makeosaurus

4 years ago

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