When one charge just isn't enough, the Goal Zero Flip 24 power bank fires up small devices from SEA to JFK with its 24 Wh, 6,700 mAh battery and 2.1A (10W max) USB power output. FeaturesBattery capacity gives about 2 recharges on most phones and can even boost a tablet in a pinchIdeal for phones, GPS receivers, headlamps, fitness trackers and morePerfect size for any backpack, purse or carry-onRecharges via compatible Nomad 5 or 7 solar panel (not included) or any USB power sourceNo on/off buttons to mess with; simply plug in your cable and charge upIncludes a built-in flip-out USB tip for easy recharging Technical specsBest UseBackpackingCharge Time (hrs)USB: 4 hrs.; solar: 5-10 hrs.External ChargeUSBBattery IncludedYesBattery TypeLithium IonBattery Capacity (Wh)24.12 watt hoursBattery Storage Capacity (mAh)6,700 milliamp hoursPower Output to DeviceUSB: 5V, 2.1A (10.5W max)Material(s)Aluminum/ABS plasticDimensions3.7 x 1.63 x 0.83 inchesWeight4.6 ounces Goal Zero Flip 24 Power Bank | redwoodtradingpost