First off sorry I know there are loads of other threads that I'd start in just the same way (as I've been reading though as many as I can) I too had quite a few cars back in the day, luckily still got most of them, along with quite a few more now! I've been mainly running the Volts 3000 MAH batteries & have found them to be very good, with good run times in the 2WD cars running Sports tuned motors. But the life span of them isn't too good & it seems after a few months if you