I have a pack of fairly new Trinity GP 3300's. They have about 2-4 runs on them. I run it till the car moves slowly. Then I go charge it on my Novak Millenium v.1.2, set the amps at 5, trickle off, voltage threshhold at 4mv. Then I start charging. It finishes charging at 535mah!!! Then when I go back out to run it, the runtime is only 5-7 minutes!!!
My 2400 sport packs last longer!. I don't think its my charger. I have an identical pack with a bit more runs on them and they run/charge fine. I am running a Monster Stock Pro motor. Pinion/spur gearing is 23/87.