I have a STEPS E8000 bike and wanted to make some improvements, like possibility to charge from any kind of CC/CV charger (even using solar panels when grid is not available) and to charge it to 41v to improve cycle life but things went wrong after first brief charge.

I charged(CC/CV) just a little from 40.3v to 40.6v when i observed that the battery level indicator is not working anymore.

The battery doesn't want to start at all and the Shimano charger is just blinking when connected, meaning some kind of error.

Now i have 2 options: buy a new battery or find some Shimano service but i have no ideea if Shimano fixes a battery without warranty.

The second problem is that im not sure if a new battery will work wihout pairing/programming.

Any thoughts why the battery(or BMS) got bricked when charging the cells directly and will a new battery work (plug'n'play)?