Great Scott It's The . . . Portable Battery Charger by Ed Riche - Pixels
Every Device should have this Upgrade! (Endless Battery Run Time) - YouTube
Greatscott - I tested a cheap PCB from Aliexpress and... | Facebook
Uses for Medical Lithium-Ion Battery to Improve Your Cart Efficiency
I followed this constant current load circuit from greatscott to determine my 18650 battery capacities. Instead of the 500k pot i used 100k and for the mosfet i used K4111 n channel