My wireless Magic Mouse has been frequently getting "disconnected" when I lift it as much as a 1/4 inch off the mouse pad to reposition the cursor. The battery is at 75% so that's not an issue. I have to wait around 20 seconds and then when I click it reconnects. This obviously is not working correctly. Any ideas as to if its the mouse or perhaps the Bluetooth connection. BTW I have a 2008 iMac.