Make a splash with Vivitar’s Solar Power Boost. This 4000mAh waterproof solar power boost charges USB devices on the go and provides 2.5 full charges for your device. With a rugged design, battery level indicator and built-in LED light, never go a second being disconnected from the world. This power boost allows for 65 hours of talk time, 55 hours of music time and 35 hours of video time. Compatible with android and apple products.