Funny how none of my Vants have failed! I guess some are bashers. I use 2s, 4s, shorty, and square as well. In fact all have survived some hard racing. Maybe charging at high rates?? I never exceed 1.5 c rate. The shorty has been a very outstanding battery. I can tell when it is in there versus other batteries. My 4s have gone three seasons now, and no idea how many on the 2s.