Had the HPI Truggy Flux on the beach and it was quite wet , anyway, I went to change battery, fitted the new one and got lots of cell count beeps instead of just 4 and then it just shot off full throttle. All I could do was steer lol. anyway it flipped over and sat at full throttle then finally stopped and I managed to discount the pack.
The ESC is Stock which is a HobbyWing but don't think it's waterproof...
It was fun while it lasted lol