Solar powered charger is a device which converts sunlight into power directly; not only solar panel can convert light to energy and stored it into inner lithium battery but can be also charged by AC 110V-240V or laptop. By output interface, you can recharge your mobile phone, digital camera, MP3, MP4, etc. whenever and wherever. It is specially an ideal standby power for hiking and traveling. http://www.chinabuye.com/2000mah-solar-charger-for-mobile-phone-mp3-pda