For when you need a little extra juice, the Guide Plus 10 charges your AA and AAA batteries on the fly, via USB or by harnessing the power of the sun! Charges from the following: Approx. Charge Time: Any USB Power Source: 8-10 hours GOAL ZERO Nomad 3.5 (solar port): 6-8 hours GOAL ZERO Nomad 7 (solar port): 2-4 hours INPUTS USB-mini port: 5V, 0.7A max (3.5W) Solar port: 6.5V, 1.5A max (7W) OUTPUTS Batteries: 4 x AA or AAA** NiMH cells USB Standard Port: 5.0V, 1.0A max (5W) Flashlight: 100mW white LED, 100+ hours* INTERNAL Battery Capacity: 10 Wh*, use only NiMH cells Life-span: hundreds of cycles* Shelf Life: 12 months* GENERAL Weight w/Batteries: 0.4 lbs (0.18 kg) Dimensions: 2.5 x 4 x 0.75 in (6 x 10 x 2 cm) Warranty: 12 Months Certifications: FCC and CE Optimal Operating Temp: 32-104 F (0-40 C) *When using GOAL ZERO NiMH rechargeable low self-discharge AA cells. **AAA Cells require an adapter, which is included with AAA battery purchase 7 watt mono-crystalline solar technology Output Ports USB output: 5 volts DC output: 12 volts General Product Weight (no pkg: 0.8 lbs, 0.36kgs Product Dimensions (Folded): 6 x 9 x 1 (inch), 15 x 23 x 2.5 (cm) Product Dimensions (Unfolded): 19 x 9 x 0.1 (inch), 48 x 23 x 0.25 (cm) Warranty: Twelve months Operating Temperatures Optimal Operating: 32°-104°F, 0°-40°C Optimal Storage: 32°-86°F, 0°-30°C