I just got a new hump pack for my firestorm. and I have been wondering what exactly mAh stands for and what difference it make. if I understand correctly voltage is the amount of power a battery has and the mAh is how long it lasts. is this right? or does it mean something else? the hump pack I got is a 5 cell 6 volt 1400mAh in case any one is wondering.
thanks

You are correct. Milli-amp hours is how long the battery will output. The higher the milli-amps, the longer it will last between charges.

Thats what i thought. thanks

mAh also is part of determining a batteries' maximum draw rate (mAh x C =amps) (amps x volts = watts) So capacity becomes much more important in electric vehicles as many motors need high voltage and have a high amperage draw. But for nitro purposes it usually just means longer run times.