Genius Energy Mouse Review @ TestFreaks
 

Today for review I have a product from Genius called the Energy Mouse and not only is it wireless but it has a built-in battery. Ok, so yes most any wireless mouse has a built-in battery but this one isn't just for the mouse, it's a power source that can be used to charge your smartphone. The battery inside of the Energy Mouse is 2700mAh in capacity and depending on the battery in your phone you could possibly get a couple charges out of it.

http://blog.testfreaks.com/review/re...-energy-mouse/