A lightweight, durable way to bring power along with you. Charge it from the wall, Nomad solar panels or car adapter for portable, hassle-free power wherever you go. Charges a variety of devices – USB, 12-volt and AC (power inverter required) output. Provides 20+ hours of power for cell phone or Goal Zero LED lights, and one to three hours of power for laptops. Long-lasting 50-watt-hour power pack. Rechargeable lithium battery; five- to eight-year life (2,000 to 3,000 cycles). Nomad 3.5 Solar Panel included. Dimensions: 8.5"L x 6"W x 1.5"H. Weight: 2.2 lbs.