Tagital&reg; 20000mah High Capacity External Power Bank Flash Charger for Apple Iphone 5S 5 4S 4; Galaxy S4 S3 Mini; Android Smartphones and Tablets High efficiency of power conversion; Duo USB output, charge 2 devices simultaneously. LED indication for Battery Status; Long lifetime:up to 1000 charge-discharge cycles High security: Protection for overcharge, overdischarge, overload, and short circuit Comes with connected cable for charging the power bank; Safe and reliable, perfect for using on traveling and outdoor activities 4 Connectors for iPad, iPhone, iPod, GPS, Sony Ericsson, Samsung, Nokia, etc