My experience is, all those ######mAh are bullxxxx! :angry:, I bought 3 (all diff brands, one for Nikon and 2 for KonicaMinolta (also Nikon equivalent), that have the mAh higher or more than twice of my 1 & 3 yrs old original ones.
Then to my dismay, they lasted only 1/2 the number of shots...