Magic Mouse keeps disconnecting from bluetooth

My Magic Mouse has just started doing this exact thing and it is driving me NUTZ!!! I have tried securing the batteries with cardboard, i have filed the little nipple on the battery to try to get a better connection, all to no avail. My next step will be trying some strategically placed foil on the connectors, if it does not work I will return it, I really don't want to so if anyone has any ideas i would love to hear them (Apple that includes you too!!)

Did the paper spacer and it solved the problem.

MM #3 is the same as the first two. I can't get the paper wedging to make any significant difference. All I have to decide now is whether the inconvenience caused by the problem outweighs all the things I like about the MM.

I have same issue with new Magic Mouse
Apple devs should investigate the cause and update the soft as needed

I took my Magic Mouse (a very early unit) to an Apple store about a month ago and requested a replacement. I have not had the disconnection problem with the new mouse. I believe there may be truth to the hypothesis that the first shipments were defective.

Yup, holding it vertically and taping it disconnects it for me too... I'm on this discussion page because, like the rest of you, my Magic Mouse keeps disconnecting. This usually happens when waking from sleep, but also at random times. Oddly enough this has only happened since I changed the batteries. The first two lots of batteries lasted a month each before I got the dreaded 20% message; this lot have gone from 100% to 73% in the space of a couple of days. Yes, I replaced the batteries in case they were duds, but no difference.

I came on here because I was getting a disconnect every 20 or so seconds.. Turns out it was indeed the moving of the mouse, then tapping back onto the mat (i'm working on photoshop, so do it a lot).. this is really annoying.. do you guys reckon it's something Apple can fix with a SW udpate? surely it's a hardware fault?

Also, regarding the batteries.. I too have noticed that since the first lot of batteries, the battery life is terrible.. goes for the keyboard too.. first sets lasted ages.. now i have to change the batteries every couple of days or so

Update: I remembered that the previous (non-disconnecting) set of batteries were Duracell rather than the Eveready sort I had in when the problem occurred. Now the mouse will only disconnect if I hold it vertical and tap it quite hard in the desk... Weird, some batteries must be a little fatter than others.

Same problem here, happened when my mouse went below 20% on the first set of batteries. I putnew ones in at about 50% and still nothing is working. It'll take forever to discover the mouse, connect for a couple seconds and say 'connection lost'.

Is it perhaps the switch? I find that the switch can get moved away from fully on just in regular usage and maybe then a sharp tap will dislodge the contacts sufficiently to cause the connection to drop. My MM isn't really bad at this, but it does drop at some time almost every day.

The biggest problem is that it REFUSES to re-connect by itself. You HAVE to force a reconnect, but that means using a mouse and the entire problem is when there is NO MOUSE to use. At the moment I keep a spare USB mouse handy, but this is a PIA. Does anyone know a way to use the keyboard to open the Bluetooth menu? Once this menu is open it's easy to use the keyboard to select the 'Connect' command, but how to open the menu? Anyone?

I charged my batteries and now it works fine. Weird.

I had this problem as well. I found that the "drop the mouse" action also reproducibly disconnected it from Bluetooth. I noticed that the aluminum battery door had developed a slight bow. I gently reversed the bow so that the door would allow less battery motion. This seems to have helped. Dropping no longer causes disconnects.

Good luck all.

I am on my 3rd warranty replacement Magic Mouse and may have finally solved the problem. I have experienced:

- Connection dropouts on bump (frequency increases as battery drains)
- Random connection dropouts during use
- Abysmal battery life (drain of around 5-10% per hour)

These issues appear to be related to battery quality. Multimeter battery tests on a failing Magic Mouse have revealed that while the battery reports 85% charge in Mac OS, the battery is actually outputting well below its expected 1.5v. I have repeatedly found that a cheaper battery will do this, for example one of those ones in a large pack from a department store that are on sale and have probably been laying around for a year or two. Such batteries are OK for torches and such (so long as your life doesn't depend on it) but not for the Magic Mouse, which seems to require a consistent near-1.5v output.

I have also noticed that a 2200 mAh rechargeable battery will not last more than a couple of days.

I have not been testing for long but my new 2450 mAh rechargeable batteries, and my new Energizer Advanced AA cells appear to be functioning very well. Tests look like taking a while as the things just aren't running out.

This possible resolution is consistent with the sporadic failure seen in these forums - with some users having no troubles, and some having extremely bad performance. It would appear that users have been purchasing a range of battery qualities.

Interested in experiences of others with this.

Bought my Mac Pro i7 in December '09 and the Mighty Mouse disconnects every few days. Seems to do it when I'm scrolling more than anything. Also I use rechargeable batteries and hot off the charger I only show 86% Battery Level. Would think it would be higher. Used a new set of Alkaline batts just to see if it was the rechargeable batts but I got the same reading. Thankfully I bought the wired keyboard.

I too have had this problem though the trick found in the link below seems to fix my issue. Primarily just below the apple logo on the 27" iMac.

http://reviews.cnet.com/8301-13727_7-10413193-263.html