Don't try to repair jet bot battery, it's just a waste of time... :)

0:00 Intro
1:14 Opening the battery
2:07 We are in (after like 30mins...), don't do it... PCB overview
3:18 cell model
3:27 LG MJ1 Installed, BMS not working :(
4:22 Example of bad BMS installation
6:25 Inserting battery and summary

To be honest, I did it just for a test how jet bot will perform in my home (and got amazed), Looking for a decent vacuum cleaner :)