Naturally, people share stuff with each other. Usually, it is food, money, clothes, etc. If a friend need something you will probably share with him. With the popularity of smartphones, the battery becomes a big problem for anyone. How it would be to be able to share your smartphone battery with a friend in need ?
External batteries are becoming more and more popular. Everyone seems to have one, but there are cases when you leave it home, or you forget to recharge it. Well, there is another solution now. PWR Mate is a small cable that you can attach to your key right. When you are in need, you can use it to chart your phone from on of your friend phones.
A smartphone needs to have the USB On-the-go support to be able to charge other smartphones. This function was added to give the smartphone the capability to host other USB devices ( cameras, mp3 players, etc ).
There is a live campaign on kickstarter. For $10 you can pre-order your own PWR Mate.