Here's my review of this cool USB charger I found on Amazon. It's a 3,300 mAh battery inside of a flashlight that can fully charge a cell phone (and have PLENTY of power leftover) as well as act as a VERY bright LED flashlight. It has two brightness levels and a strobe feature. Completely cool and fits in your pocket, purse, backpack, or glovebox. Perfect for travel! No need to sit at a Starbucks or Airport terminal tethered to a wall.
Here's where to buy: Amazon.com - RavPower Portable Charger/LED Flashlight
The RavPower LED/Portable Phone Charger itself:
Charging the flashlight/charger unit while plugged into a wall with the supplied USB cable (any micro USB cable will work). You can also charge using a laptop or any USB power source.
Plugged directly into my iPhone 6!