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More project information (wiring schematic, pictures, ....) on Instructables: https://www.instructables.com/id/DIY-...

Parts list (incomplete, see Instructables for more, affiliate links):
Aliexpress:
16x INR18650-25R Li-Ion Cell: https://s.click.aliexpress.com/e/_d6r...
1x BMS: https://s.click.aliexpress.com/e/_dXr...
1x LiPo Voltage Tester: https://s.click.aliexpress.com/e/_dUT...
1x Current/Voltage Monitor: https://s.click.aliexpress.com/e/_dY9...
1x Boost Converter: https://s.click.aliexpress.com/e/_d7p...
1x Buck Converter: https://s.click.aliexpress.com/e/_d9b...
2x DC Jack: https://s.click.aliexpress.com/e/_dXZ...
2x DC Jack Connector: https://s.click.aliexpress.com/e/_d8O...
3x SPDT Switch: https://s.click.aliexpress.com/e/_dYW...
Ebay:
16x INR18650-25R Li-Ion Cell: http://rover.ebay.com/rover/1/711-532...
1x BMS: http://rover.ebay.com/rover/1/711-532...
1x LiPo Voltage Tester: http://rover.ebay.com/rover/1/711-532...
1x Current/Voltage Monitor: http://rover.ebay.com/rover/1/711-532...
1x Boost Converter: -
1x Buck Converter: http://rover.ebay.com/rover/1/711-532...
2x DC Jack: http://rover.ebay.com/rover/1/711-532...
2x DC Jack Connector: http://rover.ebay.com/rover/1/711-532...
3x SPDT Switch: http://rover.ebay.com/rover/1/711-532...

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!

Websites which were shown during the video:
http://www.ti.com/lit/ds/slusak9/slus...
https://www.ti.com/lit/ds/symlink/tps...
https://drive.google.com/file/d/0B5ce...

Thanks to JLCPCB for sponsoring this video
Visit https://jlcpcb.com to get professional PCBs for low prices

Music:
2011 Lookalike by Bartlebeats
Killing Time, Kevin MacLeod
(incompetech.com)