1. Charge most mobile phones for any emergency
2. Charge MP3 & MP4 anywhere anytime you want
3. Power comes from your pulling, the harder you pull, the more emergy you create
4. Approximately 2~3 mins of talking times(and several hours standby)per min pulling
5. Never needs changing battery
6. Built-in rechangeable Li-ion battery
7. Eviromentally Friendly
8. Acting as a spare battery for mobile phone after full charged by AC/DC adapter
9. Small and light weight, easy to carry it along with
10 Perfect for charging your phone/MP3/MP4 while hiking, playing ball game, boating, or anywhere in need