Build your own lithium Ion 12V battery using this holder and some 18650's. This is a great first project to practice soldering and building 18650 packs.
Good news, the BMS actually did work. Some BMS need to be woken up by applying a charge current. The BMS woke up just fine!
12V Battery Shell:
https://ebay.us/XO0GiN
Tools i use
ISDT 8S battery Monitor
https://amzn.to/3kwiqY5
ToolkitRC 8S charger
https://amzn.to/3dSxMon
icharger X8
https://amzn.to/3pXGAfa
Bench Power Supply
https://amzn.to/3sETf8n