This charger uses the USB power of your computer and is proven to be an energy saving method. It can charge either AA or AAA size batteries of Ni-MH or Ni-CD type. Now this USB AA & AAA Battery Charger is a great gadget! It's compact, light and powerul. It's also simple to use - just plug it into a free USB port and watch your batteries get energised! Charging is indicated by a LED's - red means charging in progress and green means the charge is complete. Maximum charge time for batteries is 12 hours. This USB Charger supports both AA and AAA Ni-MH and Ni-CD batteries. It's built-in automatic charge cut-off system makes for safe battery charge operation. Features - Compact, light weight and powerful - Easy to use: Just plug and charge! - Supports AA and AAA Ni-MH and Ni-CD batteries up to 2200mAh capacity - Built-in automatic charge cut-off system for safe operation Specifications Charging current : 200mA Specified temperature : 0-55 C Size : 97 mm X 76mm X 29mm Weight : 80.8g Input: - USB Power: DC 5V /500mA Output: - DC 3.5V max., 260mAh max Package Includes - USB AA & AAA Battery Charger - USB power cable