After going through a set of batteries fairly quickly on my magic mouse I got some USBcell rechargeable batteries
http://www.usbcell.com/product/1
When they run flat I sling them in a usb port to charge up. Works superbly!
http://www.usbcell.com/product/1

When they run flat I sling them in a usb port to charge up. Works superbly!