Plan V: The Phone Charging Device That Doesn't Need to Be Charged

Eighteen months ago, friends Evan Stuart and Luke Trevitt found themselves in a situation that could have gone terribly wrong. They were stranded in Bogata, Colombia with dead mobile phones and battery packs and they couldn't find their hostel. After hours of navigating dark and dangerous streets and a few close calls, they finally found the place. That night, Stuart and Trevitt decided to create a portable, fail-safe charging device that one can rely on anywhere in the world.

The result is Plan V, which is like a car jumper cable for your phone. Plan V is designed to sit on your keyring and never needs to be charged. No bigger than a normal house key, it's so small and lightweight, you'll forget that it's there until you need it. When you do need it, simply connect a 9 volt battery to the device and plug it into your phone. These batteries are widely available and can be found in convenience stores, gas stations, and supermarkets.