... power off, make better use of battery energy.4.Unique high-technology, provide overcharge protection, over-discharge protection, overload protection, ... protection,etc; 5.After 72 hours aging test, the product have high performance and high stability.6.fashionable design with mini measurement , ... 43,Packing 1pc OEM is welcome.Welcome to our factory!! high quality for ipad 4 power bank from factory