Originally Posted by CentralCoaster

I wouldn't bother. The bullets are probably low quality, and they loose their springiness when they get hot.

Resistance causes heat which causes more resistance. Bad bullet connectors will melt the case, cause a solder failure, and damage the cells. I had this issue with both my Gens Ace packs. (And yeah I tried prying the springs back out repeatedly.)

You also need to pop the case open and check to be sure the female bullet connector hasn't come off. The case will hold it snug enough to show voltage and charge, but it will fail or run really hot in the car.