Rechargeable NH-AA 1.2V 1450mAh Pack Of 4
Never need to buy AA batteries again! Recharge in any USB Port, just pop the cap and juice it up. Includes 4 AA batteries, a plastic protector and a bonus adapter to power your HERO board anywhere. Can be used on anything that takes AA batteries.
Includes a bonus power pack so that you can connect them directly to your circuits!