New Trent Easypak 7000mAh Portable Triple USB Port External Battery Charger/Power Pack for Smartphones, Tablets and more (w/built-in USB cable)
I purchased the New Trent IMP70D for charging my iPhone and iPad during business trips and also to use it for my Kindle fire devices on long family trips.  The device is easy to charge, the LED is simple and I have used it to charge my Ipad 2 multiple times.  It is fast and simple.  Great device at a great price.