Charge your smartphone or USB-docked electronic gear practically anywhere. When fully charged, the Switch 8 can fully recharge a dead smartphone in one hour. Recharge the Switch 8's integrated 3.6-volt lithium-ion battery from any USB port in just four hours or hook it up to a Goal Zero Nomad solar panel (not included) for sustainable recharging anywhere the sun is shining. Weight: .2 lbs. Dimensions: 5"L x 1"W x 1"D.