Solar Charger 25000mAh, Hiluckey Outdoor Portable Power Bank with 4 Solar Panels, Fast Charge External Battery Pack with Dual 2.1A Output USB Compatible with Smartphones, Tablets, etc. (Waterproof)25000mAh High Capacity: Built in 25000mAh Li polymer battery, it can charge your phones 8 10 times or tablets 3 4 times for an average of 9 days of usage per charge. 4 Solar Panels: With 4 foldable high effeciency solar panels, up to 1A input current under the sunlight, which is 4 6 times faster than the other solar chargers. You can also use micro USB cable to charge it. Dual USB 2. 1A Output: Dual 2. 1A USB ports allow you to charge 2 devices