Power pack (5000 mAh). The chargers slim, lightweight black rubberized casing is portable and with the Grade A 5000mAh battery, dual output makes it convenient to charge two hand held devices at once. Can support both 800 mA (low) and 1.2A (high) to most mobile phones and tablets. It also has a built-in lithium battery and can be recharged using our 2-in-1 USB cable (Mini & Micro USB connectors), solar energy or the integrated USB input cable. The solar power pack also comes with a built-in solar indicator and a battery capacity indicator for your convenience. Fully charges in 7-8 hours (by USB) and will hold its charge for 4300 hours, over 6 months, of standby time so it's ready to use when you need it most.