islion solar interrupted battery Features: It can charge up all kinds of handsets or USB interface digital products under sunshine directly, and also can charge up the devices mentioned above without sunshine through releasing electric energy stored in it. It is convenient for you to take with when you are out on business, on travel, on a long-distance bus or ship, in the fieldwork, etc. It is a portable, environmental-friendly, light-weight, flexible, durable and versatile charging product. Characteristics: Peak power supplied by photocell: 1.54W Operating voltage: 5.5V (max)　　 Charging current: 280mA (max) Battery capacity: 2800mAh Output voltage: 4.5V-9V (adjustable) Output current: 1A (max) Charging time: 8-10 hours (illuminating scope: 100mW /Cm2)