In this episode I will convert my cordless drill battery from ni-cd to lithium ion cells salvaged from laptop batteries. It's very popular on Youtube and I want to see what the fuss is all about. In reality it's very dangerous... so be careful if you try it.

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4S protection board schematic: https://i.imgur.com/mFMsTHt.jpg

Electronic parts:
4S Protection Board with balance function: https://goo.gl/te4uR1
12V 2A charger/power supply: https://goo.gl/RTVjK2
3A boost Converter: https://s.click.aliexpress.com/e/_DkU...
2A Step-down Power Converter Module: https://goo.gl/y2UP9E
Power Supply Female Jack/connector: https://s.click.aliexpress.com/e/_A9UT4g

---------------- Music ---------------
Track: Alex Skrindo & Miza - Thinkin' [NCS Release]
Music provided by NoCopyrightSounds.
Watch:    • Alex Skrindo & Miza - Thinkin' | Hous...  
Free Download / Stream: http://ncs.io/ThinkinYO

Song: Giraffe Squad - Wait For Me [NCS Release]
Music provided by NoCopyrightSounds.
Video Link:    • Giraffe Squad - Wait For Me | Trap | ...  
Download/Stream: http://ncs.io/WaitForMeCr

Track: Kozah - Haha [NCS Release]
Music provided by NoCopyrightSounds.
Watch:    • Kozah - Haha [NCS Release]  
Free Download / Stream: http://ncs.io/HahaYO

Track: Raven & Kreyn - So Happy [NCS Official Video]
Music provided by NoCopyrightSounds.
Watch:    • Raven & Kreyn - So Happy | House | NC...  
Free Download / Stream: http://ncs.io/SoHappyYO

Track: T-Mass - Ignoring My Heart [NCS Release]
Music provided by NoCopyrightSounds.
Watch:    • T-Mass - Ignoring My Heart | Trap | N...  
Free Download / Stream: http://ncs.io/ignoringmyheartYO