UNYSON Gen3 Metal Case 400A 8000mAh Ultra-Portable Jump Starter/Power Bank, Smallest in the Kind, 5 Colors with Wrapping Bag (Black) Most compact 8000mAh Lithium Polymer jump starter in the kind, weighs only 8oz. 4.8inch in diameter, yet powerful enough to jump start 12V gasoline vehicles, light duty trucks, boat and more, for up to 10 times on a full charge, Look at our video demo at unysonsys.com The 8000mAh Lithium Polymer power bank charges all your cell phones, tablets, PSPs and more by using the included 4-in-1 connector. Can be charge to full condition in about 3 hours with either universal AC adapter (100V -240V) or 12V card cigarette lighter. Ultra bright build-in LED flash light with 3 mode, flash, strobe and SOS signal that helps you when you need it Best Protection Ever with overload protection, short circuit protection, reverse polartiry protection, over current protection, over heat protection, reverse current protection and over charge protection to ensure safety of usage. Low power leak battery that can hold power for 3 - 6 month (recharge every 3 month ). Low power leak battery that can hold power for 3  6 month (Recommand recharge every 3 month ). Not Powerful enough? See our 14000mAh Diesel Engine Jump Starter at HERE: http://www.amazon.com/dp/B01AKBABHK