The delivery was very quick. The first time you charge the batteries (4 pcs.) Duracell Supreme AA NiMH rechargeable battery AA 2650 mAh they have been used immediately for use in a digital camera. The Akkukapzitätsanzeige on the camera was significantly longer in the "full" state. There were about 30% more pictures to be made under the same conditions as with other batteries. To "long-term behavior" after several charging / discharging nor can any statement be made.