[suicideneil]

Hot lipo = either overgeared or yep, the lipo cant handle the strain.

I'd say to either gear down a bit, or try a more powerful lipo; something like ~4500mah and 35c should be fine I reckon. How many cycles do you have on that lipo/ age?

You could also try raising the LVC a little- 3.2v-3.4v per cell shouldnt shorten runtime very much, but it could help the lipo overheating at the very end of its discharge cycle.