Goal Zero Guide 10 Plus Battery Pack: * Ultra-lightweight USB solar charging system that fits in your pocket * Use as a single unit power pack to power your device or as a power source to recharge the batteries for use in any AA or AAA battery-powered device * Charge AA/AAA batteries from the sun in 6 hours with Nomad 3.5 solar panel or 2 hours from the Nomad 7 * Recharge your cell phone 1-3 times per charge * Built-in LED flashlight that runs 20 plus hours per charge * Stores power for charging devices day or night * Very small, about the size of a cell phone * Can also charge via USB * Includes a 4 pack of AA rechargeable batteries * Material content: plastic