With 2,650 mAh battery is of Duracell AA for the best, I thought, and immediately bought mehere packs. The first sentence I still thought I had done something wrong when loading, because the device was not even a sound. In the second set, I thought I would just caught a defective battery pack. Unfortunately, I had to realize then that all batteries of this type of discharge itself in a very short time, even if they are stored in a dry and separated. The value of 2,650 mAh must be a theoretical value that applies only under laboratory conditions. The unwrapped batteries I could not return, but only the last one bought, closed package took the dealer without much to ask back - he'll know why. I wonder what the Produktverantwotlichen and marketing experts of this company think actually. Negative experiences with such product, each consumer must nevertheless say: never again !! Duracell