In this project I will show you how to create a Laptop PowerBank. It mainly consists of a Li-Ion battery pack and one buck and boost converter. This way the PowerBank can get charged up through the Laptop power supply and aftewards charge up the Laptop directly to give it an additional run time of 3 hours. Let's get started!

Step 1: Watch the Video!

The video gives you all the information for a basic overview of the project. During the next steps, I will present you more detailed information.

Step 2: Order Your Components!

Here you can find a parts list with example seller (affiliate links):

Aliexpress:

16x INR18650-25R Li-Ion Cell: https://s.click.aliexpress.com/e/_d6ri0or

1x BMS: https://s.click.aliexpress.com/e/_dXrLJ6X

1x LiPo Voltage Tester: https://s.click.aliexpress.com/e/_dUTvD19

1x Current/Voltage Monitor: https://s.click.aliexpress.com/e/_dY9f0UX

1x Boost Converter: https://s.click.aliexpress.com/e/_d7pv5aR

1x Buck Converter: https://s.click.aliexpress.com/e/_d9bTT6r

2x DC Jack: https://s.click.aliexpress.com/e/_dXZeR8b

2x DC Jack Connector: https://s.click.aliexpress.com/e/_d8OHOx9

3x SPDT Switch: https://s.click.aliexpress.com/e/_dYWkMuB

Ebay:

16x INR18650-25R Li-Ion Cell: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x BMS: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x LiPo Voltage Tester: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Current/Voltage Monitor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Boost Converter: -

1x Buck Converter: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

2x DC Jack: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

2x DC Jack Connector: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

3x SPDT Switch: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Amazon.de:

16x INR18650-25R Li-Ion Cell: https://amzn.to/2HjPliH

1x BMS: https://amzn.to/2TWqbb6

1x LiPo Voltage Tester: https://amzn.to/2RyZSex

1x Current/Voltage Monitor: https://amzn.to/2Hvcezw

1x Boost Converter: https://amzn.to/2VXei6G

1x Buck Converter: https://amzn.to/2ATqiNP

2x DC Jack: https://amzn.to/2RB55Cp

2x DC Jack Connector: https://amzn.to/2RB55Cp

3x SPDT Switch: https://amzn.to/2W6nLca

Step 3: 3D Print the Enclosure!

Here you can find the 123D files as well as the .stl files for my enclosure. But make sure that you also print the corrected lid file which is 5mm longer.

Step 4: Do the Wiring!

Here you can find the wiring schematic along with tons of reference pictures of my laptop powerbank. Feel free to use them to create your own powerbank.