1. Lmported monocrystalline silicon or polysilicon of high conversion efficiency has been adopted, the solar energy conversion rate is up to more than 16%. 2. Specifications for solar panels: 5.5v 150mA, power up to 0.8W. 3. The built-in high-capacity rechargeable lithium battery (900mAh or more, different models optionable match the lithium batteries of different specifications). 4. Output voltage: 3.7v, 4.2v, 5.5v and 9v, generally 5.5V, multiplicate output ports optionable. 5. Output current: 400-800mA 6. Charging time for mobile phone: About 60 minutes (Different brands and models of mobile phone is with different charging time). 7. Charging time for built-in battery of Solar charger is 10-15 hours(depends on light intensity and battery capacity). 8. If computer USB port or AC adapter recharge the built-in battery, charging time: About 3-5 hours.