I've been using the Energizers in my Fuji Digi-cam...I've had the same two sets of 4 for about a year...Im just starting to notice less flash shots per charge...but barely...I might be imagining it...
I also have 2 in my wireless mouse...seems like at least a month between charges on those...
AA rechargeables have come A LONG WAY since I first got a D7...!!!