Ansmann maxe batteries aa rechargeable ansmann 2312 3003 p the ansmann maxe rechargeable flat top battery is ready to use straight from the pack the other huge advantage of ansmann maxe batteries is their low self discharge rate this means they do not lose their charge as quick as ordinary rechargeable batteries in fact they will stay charged for up to 12 months p p these ansmann maxe aa rechargeable batteries are nimh nickel metal hydride and have a high capacity of 2100mah p