Nice photo Mike!
We keep a history of parts that failed, so we can add your photo to the archives. I saw you working, and I want to
apologize for not taking time to stop and say hi, but I always seemed to be between emergencies and I started having trouble keeping straight which pit I was supposed to be in next.
This backup battery came loose during the match and was damaged. It wasn't due to the charging circuit. Typical electrical vs. mechanical debate that the battery lost.
The black wire shorted at the battery terminal and the battery fell out of the robot and started to smoke on the field at the starting positions. The black wire got yanked to stop it I believe.