Does the Apple Magic mouse need to be turned off after use or does it power down automatically?
It seems to use new batteries every month!?!? Can this be right?
It does auto-sleep, however a large amount of use will use more power.
About once a month sounds about right, given you use it every day for about 8hrs or so.
I haven't seen any usage stats, but haven't looked hard either. My personal experience has been this:
That means, when I turn it off when I 'm not using it, it uses approximately 8% power per week. When I leave it on, it uses nearly 20% per week.
That's really dramatic, so I'm inclined to think I've been using my computer more this week than I did then, but I have no way of comparing use time from that long ago. I suspect batteries drain faster when leaving the mouse on, though.