Your 'low-battery' worries are over with this portable charger and backup battery from Scosche for the iPhone or iPad. The goBAT II is one of the most powerful and compact backup battery / portable charger in the market today. With 5000mAh of power, this backup battery charger your iPad up to 55% and other phones 2 to 3 times. With 2 USB ports that can be used at the same time, the 2.1 Amp port gives you the ability to charge tablets, while an additional 1.0Amp ports lets you charge devices like phone, iPhone or iPods. The convenient design allows you to store this in your luggage or brief case. You can also use your existing USB cables to charge your phone or any other USB powered devices. Package includes Micro-USB cable to charge the Scosche goBAT II. USB data cable for the Apple iPhone / iPad not included.

Specifications:
Battery Type: 3.7v - 50000mA Lithium polymer
Output: 5v – 5000mAh
Charge time: 6-8 hours
Discharge duration: About 1 hour when using iPhone and iPad at the same time, 3 hours when using iPad only and 2.5 hours when using iPhone or other mobile devices

Compatible with the Apple iPad, iPad 2, iPhone, iPhone 3G, iPhone 3G S, iPhone 4 and iPhone 4S phone models.

Also compatible with the following tablets with corresponding USB cable (not included): Samsung Galaxy Tab SGH-i987, Galaxy Tab SCH-i800, Galaxy Tab SPH-P100 Galaxy Tab SGH-T849, Galaxy Tab 8.9 GT-P7310 and Galaxy Tab 10.1 GT-P7510 devices.