You're mouse must use a lot of power. I use a Logitech mouse (http://www.logitech.com/en-us/product/anywhere-mouse-mx-p?crid=7 http://www.logitech.com/en-us/pro

You're mouse must use a lot of power. I use a Logitech mouse (http://www.logitech.com/en-us/product/anywhere-mouse-mx-p?crid=7 http://www.logitech.com/en-us/product/anywhere-mouse-mx-p?cr...) and I forget it even runs on batteries. If you have enough light in the room a solar keyboard is also pretty awesome, I had one for the longest time. Kept it until I accidentally broke the keys cleaning it. Keyboard selection is very much based on taste though, so I assume you probably saw one and didn't like it.