So what do you do for more power? Is it a Mophie case or many a NewTrent? Some other battery charging device? I ordered a NewTrent a few years back. At the time, I didn't think I would ever use it. It was a good deal, so pulled the trigger. Now I'm finding it invaluable. Hurricanes, Apple launches and CES. This thing comes in handy. I'm thinking that I'll add a battery (AAA) based charger to my arsenal. What's your go to iPhone battery charging device? What's working for you?