Electroniclovers123
1. Here are the product we need.
2. Screenshot of some steps.
3. Test and finished.
Product list:
D882 transistor https://www.utsource.net/itm/p/1241268.html
1K resistor https://www.utsource.net/itm/p/8295217.html
10K potentiometer https://www.utsource.net/itm/p/6494127.html
Micro USB female socket https://www.utsource.net/itm/p/8299050.html
More details, pls check the video on Youtube:
FrazzledBadger
Discrete Electronics Guy
You're simply destroying your batteries. These batteries need voltage and current control during charge, specially at the end.