I had the same thing happen with a venom pack and a CRC pack, motogod hit the nail on the head with the bullet connectors, I use the fantom racing ones myself, they are pricey but well worth the money. the crc folks sent me a new pack, then sent the old one back to me as the only thing that happened was the female part got hot and melted the side of the case as it was still connected to the battery itself, they just heated the plastic up and put the bullt back where it used to be, have not had another problem with that pack since I switched to a solid connector.