Levels Solar Backpack Color: Black High end solar backpack - Solar Daypack - for the serious enthusiast charges naturally by sunlight or by outlet Charges your smartphone, laptop or tablet using the Sun's Solar Energy - Battery Capacity: 2400mAh Sleek lithium polymer battery is lightweight & powerful, its fully charged by sun in just 6 hours, fully charged by outlet in just 4 hours. 45 Minutes of sunshine gives you 1 hour of talk time. Expansive 6 watt panel will give a smartphone a 25% boost in only one hour of sunlight. Perfectly compatible with iPhone 4, 4S, 5......iPad, GoPro, Galaxy 5III, Kindle, Droid Razr, and many, many more. Durable Birksun backpacks are the leader in this cutting edge technology, these backpacks are durable enough to go cross country, also perfect for city slickers on the go who always need to be connected - DC Adapters: 8Pin, 30Pin, Micro-USB, Mini-USB