1,Li-ion battery 2000mAh, can fully charge iPhone 2, ... crystalline): 5.5V/110mA2, Li-ion rechargeable Battery: 3.7V/2,000mAh3, Mini USB input: 5V/1A4, Output voltage/current: 5V/1A5, ... time: 6 hrs (by laptop) 5hrs (by 5V/500mA travel charger) 18-22 hrs (via solar panel ... indicators shows power level, each represents 25% of battery usage8, Protection: reverse current protection circuit integrated to ...