SunJack® helps mobile users stay charged on the go anywhere the sun shines. The SunJack® is able to fully charge its internal battery pack in about 5 hours of direct sunlight, or directly power any USB device. When the sun isn't shining, users can still energize their devices from the powerful SunJack® battery, which holds enough charge to power up to 4 iPhones. Portable power is valued by campers, boaters, travelers, survivalists, hunters, rock climbers, and working professionals. The SunJack® is a critical item in any emergency or disaster preparedness kit. There is growing demand to be untethered from a wall socket and to become energy independent. The SunJack® is compatible with most mobile phones, iPad/tablets, USB lights, digital cameras, MP3 players, and portable gaming devices. The SunJack® is supported with a one-year limited warranty.