Keep a power in your pocket 1. Use Alkaline, Oxyride, lithium or Rechargeable AA Batteries 2. Four different models of mobile adapters are provided for your optional use: Nokia, Siemens, Motorola Samsung, Sony Ericson, LG and other digital products such as MP3, MP4 3. Charging current: maximum current: 310mA 4. The transfer efficiency rates as high as 93%, one AA battery to be possible to converse on the telephone continuously 100-180minutes, Waits for an opportunity for 48 hours 5. Logo can be printed on the charger, good for promotional purposes 6. Any colors available as you like.