... device and is extremely easy to use: Just set the battery voltage, find your adapter tip, and connect! For even more ... save users both money and frustration. SpecificationsPrimary Function: High Capacity Solar Charger and Battery Solar Panel Type: Polycrystalline Peak power supplied by ... - Solar: Approx 26-30 hrs Battery Capacity: 3.7V 20,000 mAh Output (V): USB (5V), 3V, 6V, 9V, 12V, 16V, 19V, 22V, ...