New Trent Easypak 7000mAh Portable Triple USB Port External Battery Charger/Power Pack for Smartphones, Tablets and more (w/built-in USB cable)
I was able to charge my Galaxy S3 from close to 0% about 3 times before exhausting the battery. Next I am going to try it out on the Note 2 and see how it handles that! The battery is about the size of a deck of cards. It has a built in USB cable and a micro USB cable. There are also 2 USB ports that you can use to plug in other usb chargeable things like a tablet or rechargeable camera. This thing is great if you know your going to be at an airport or on a long car ride and you don't have a car charger or 