the battery dies from hitting the battery box boss and crushing the middle bottom cell if you are using a 3x2 hump pack. There are a few ways to fix this, you can grind down the box a few mm and put a floor in, like a plano box divider tab, or lexan, them add your padding. The boss dents the cell, causing it to fail early and ruin the pack. It takes a while, but based on your track and frequency of running, the hump pack with only the included foam will fail from the boss beating a dent into it.