Tenergy's 12 Pack NiMH AA rechargeable batteries measure 50.5mm (length) x 14.5mm (diameter) and fit any standard alkaline AA size battery device. Tenergy rechargable batteries aa typically generate energy savings after 10 charges. In addition, these recharge aa batteries reduce the carbon footprint by limiting the waste caused by disposable batteries. Switch over. Save. Reuse. Recharge with Tenergy. Ideal rechargeable replacement AA cell is perfect for high/low draining electronic items. Use it in all your household everyday devices such as LED lights, flashlights, solar lights, night lights, calculators, remotes, controllers, cordless phones, RC toys, headlights, garden lights, headsets, alarm-clocks and many more. Tenergy rechargeable 1.2V NiMH battery keeps your devices running with a capacity of 2500mAh. No memory effect - With no memory effect on our rechargeable AA NiMH batteries, charge your batteries anytime. Even when they are close to full or partially drained yo