Mini USB Converter for iDevices
Most people nowadays have a blackberry, android, or iPhone as their smartphone. As you well know, Android and Blackberry use a mini-USB cable to recharge their batteries whereas Apple has their own unique cable. I propose the creation of a case that holds the backup battery for the iPhone/iPad/iPod and is charged by a mini-USB; when you plug it in, it charges itself and the iDevice.
So, if you ever run out of battery at your friend's house and their phone is powered by a mini-USB cable, you can use their cable to charge your phone and case at the same time. When the battery on your iDevice runs out, you turn the case on and it charges your iDevice from its backup battery. The case also serves the dual-purpose of providing protection against damage.
Reward: a FREE product