New Trent Easypak 7000mAh Portable Triple USB Port External Battery Charger/Power Pack for Smartphones, Tablets and more (w/built-in USB cable)
The imax power IMP500 has been a lifesaver. I first use it on a trip flying to New York  and it didn't disappoint. The battery power makes that little bunny look weak. I watched Dark Knight movie and played games on my ipod touch and when we landed it still had plenty of battery reserve. The set up was easy and I have been using it for over a year and I don't have any problems or complains at all. I wish more products worked this well.