Scosche FlipSYNC Until they figure out how to make smartphone batteries last a whole lot longer, you're going to find yourself away from home or office with a nearly dead phone, again...

Fortunately USB “outlets” are becoming more and more common. Of course, your laptop has them, but so do an increasing number of cars, airport “charging stations,” universal wall chargers, etc. What you need then is the proper cable for your iPhone, Android, Blackberry, or whatever. This is it. The FllipSync is tiny and rugged enough to fit on your key chain, yet contains everything you'll need to charge or sync your device. Also, with a FlipSync, you'll have an always-with-you thumb drive (using your smartphone's memory). $14.99 with free shipping at NewEgg.