A multi-functional solar emergency charge. Built-in 1500mAh high capacity rechargeable polymer battery. You can charge your mobile phone, digital camera, PDA, MP3, MP4 whenever and wherever. Stylish design and convenient to take it with you. High solar energy convert efficiency over than 15%. Solar energy board: 5.5V/800mA. High capacity built-in polymer battery: 1500mAh. Charging time about 60 minutes (the time is a little different for different mobile phone). To charge the built-in battery in the charge using solar energy: 10-15 hours. To charge the built-in battery in the charger using computer or AC adapter about 4 hours.