Force crap to work

Let's see if there are more issues.
Following steps will be:

1. Charge cell by cell each cell to less then 3.6V (Limit the current below 0.5A-1A obligatory, I will go with 10-50mA first, monitor both current and voltage during charging)
2. Rebuild the contacts where necessary.
3. Hope the chip is working.

Fix the battery together to test it.