Wynn,
Normal battery temp at the end of the flight is about 105F ish on a 90F day, can always pick them up, motor is a little warmer around 120F. I fly every week and normally charge them the night before, if I miss a week they will stay at the 30% level until charged. When I check the pack it seems that the plastic wrapper is what is puffed. How much puffing is OK? What causes this and should I send them back to TP? The pack still takes a balanced charge (within 0.02) and performs solid to the end of the flight.
Best, DennisT