Fuel may be the world's tiniest phone backup battery

The Fuel backup power source is a Kickstarter project from Devotec Industries, a maker of backup batteries and Bluetooth speakers.  (Is it just me, or does it seem like a lot of companies are looking to expand their product lines through crowd-funding projects lately?)  The Fuel is a 220mAh emergency power source for any phone that is charged with a microUSB cable.  It looks like a tiny fuel can (1″ X 1″ X 0.5″), and it's small enough to keep it on your keychain.  The body is made of aluminum, and the little “spout cover” is actually a male microUSB connector that plugs into the phone for charging.

The Gadgeteer , Fuel may be the world's tiniest phone backup battery, Fuel may be the world's tiniest phone backup battery