ExpertPower 20000mAh Power Bank, Long lasting High Capacity Portable Charge, External Battery Pack for iPhone 6 5S/5/4S, iPad, iPod, Samsung Galaxy, Cell Phones, Tablets. (White)&hellip; Ultra-Strong: Li-ion polymer cell and premium microchips are used to create our high-quality portable charger Ultra-Speed: A 2.1A output for faster charging of your ipad, camera, PC etc. and any other 1A output devices with over-current protection Ultra-Secure: Security protection designed for short-circuit and over-current protection. Ultra-Safe: Keeps charge with a standby time up to 6 months after fully charged. 500+ recharge cycles over the life of the battery