I've had good luck with energizer rechargeable batterys. If you us a good charger, it extends battery life. I've only been using energizers for about six mouth, so I just don't know how long they will go.The charge lasts about the same and charge time remains consistent, when charg ing.Anyway you look at it, rechargeable batteries are cheaper to us than standard batteries.

I have received 10+ years of service from these NiMH batteries. They have been used and abused, but continue marching. However, at this age, they only average about 52% of their rated capacity, when discharged at 500mAh.

Good experience so far.