is my lipo dead?

[Revracer]

well i noticed a serious drop in performance near the end of the run as well. and the run didnt last near as long as it usually does. and it wasnt a drop like the voltage was too low. it still had punch and would wheelie with a hard grab on the throttle, but it wasnt 3s punch. ive never driven a 2s so i cant compare but... do you think MA will take it back?