... Unique design Portable and useful Rubber and metal case li-ion battery charger Features:LED lantern ,Torch and SOS signal ... and mold in the marketSpecification:1. solar panel: 0.55W2. li-ion battery: 3.7V 1700mAh3. Input: 5V 500mA4. output: 5V/ 500mA, output ... function: Over charging, over discharging, over current, short circuit11. Li-ion battery span life: 500 circles; LED span life: 50,000Hrs ...