Magic Mouse requires much more power draw from the 2 AA batteries than the Logitech M600 in that a same pair of batteries that were claimed by OS X as dead (under 5% charge on the upper right banner bar and system prompt for change of batteries) is still able to power Logitech M600 immediately taken out of Magic Mouse. In Logitech's product spec page, it states that it can be powered by a single AA battery and can last 6 months with a new pair. A Magic Mouse would probably only last a month and a half :(