Package List: 10* AA USB Rechargeable Battery Features: As long as you have a USB, and you can charge it. From digital products to make your full power Applicable to all digital products powered by AA battery. Plug into any USB port to recharge Can Be Charged in Typical AA Battery Charger Great for Cameras, Remote Control Cars, MP3 Players, AV Remotes, Flashlights etc Strong Elastic Retainer (so you don't lose the cap) Specification: Voltage: 1.2V Capacity: 1450mAh Rechargeable times: 400 ~ 600 times Charging time: 5-6 hours charging time Housing material: stainless steel clamshell Power Source: USB 5 V DC or Can be Charged by Conventional Charger Dimension (AA): 50 (L) x 15 mm (Diameter) Charge batteries before first use LED light on showing battery is charging, light off charged Product size: 14.10mm * 50.10 mm (and 5 of the battery size) Products weight: 50g