For anyone in need of extra power, the goBAT II provides an innovative solution to the dreaded low battery? warning. The goBAT II is a powerful backup battery and dual port charger for your mobile devices. The internal 5000mAh ion battery will keep your devices going long after they normally would. A drained iPhone 4 can be charged 2.6 times with a fully charged goBAT II. An iPad can be charged up to 55% of full charge. This is the ideal battery for long commutes, airport travel and camping. The goBAT II provides 2 USB charging ports that can be used at the same time. A 2.1 Amp port gives you the ability to charge mobile devices including tablets (iPad and Samsung Galaxy Tab). An additional 1.0 Amp port lets you charge your additional devices (iPhone, iPod, etc.). Power and convenience are packed into a surprisingly small size. The goBAT II can easily fit into your hand or slip into luggage for easy travel. Four blue LED lights let you know just how much battery life is left on the goBAT II.