A Quick Question About Batteries

[SiIV]

I know that 2000 mAh batteries and 2500 mAh batteries will power the gp2x for different periods of time. But what I want to know if it is directly proportional to the mAh? Or does the 2500 mAh have less stress on the batteries, and as a result even longer battery time that is proportional to the 2500?
An example:
2000 mAh = four hours
2500 mAh = five hours
or
2000 mAh = four hours
2500 mAh = five+ hours
I was always wondering this, does anyone know?

 

[reallynotnick]

To my understanding it is the first one, because it is mAh being hour. Its a measure of power over time, so it should be all proportional. You should get 25% longer battery life with 2500mAh batteries over 2000mAh batteries. Of course some batterie brands are a little better then others.