hi ive been using my charger and battery for weeks now but just today the battery stuffed up.just yesterday it would run for about 12mins after the battery was charged but today it ran normal for the first run and i decided to have another run so i charged it again. when the battery was redy so i hooked evrything up then for about 4 seconds it worked than went back to accelerating then stop then accelerating thn stop etc(the accelerating then stop usually happens when the battery is nearly flat).i use a ansmann acs67p + charger with a traxxas 1500mah battery.I'm not sure if its the charger or battery.

thanks

The accelerate/stop thing is the speed control telling you that your battery is low. It should be set at a voltage that will protect your batteries. So it is possible you've damaged the battery, but not very likely.

It could be that the charger isn't fully charging your batteries, isn't detecting peak properly. Best way is to check the voltage after the charger says they are done and go from there.

You are using nimh batteries, right?

yea its a battery problem.i charged another battery on the same charger and it worked fine