My Magic mouse connection keeps dropping in and out ever since i upgraded to OSX Lion

I am running 10.6.8.

My Magic mouse has been working fine for years on all of my machines. All of sudden last week (i don't know if an update caused it) after I changed some dying batteries, it started dropping it's connection. It happens randomly- sometimes multiple times a minute or it can work fine for an hour. Whether I'm using it or not, the CONNECTION LOST ghost window pops up and then a few minutes later it will reconnect.

The battery meter in system prefs says it has 100% battery life and that hasn't changed for days with it being on constantly. Rebooting the mouse, bluetooth, or the whole machine doesn't help.

The device was already listed as a favorite. No settings were changed prior to this becoming an issue.

I read another thread that suggested the bluetooth on my iPhone may be interfering it so I turned the bluetooth on my iPhone 4s off to no avail.

If I use the Promote app, there are no connection issues. It's only my MAGIC MOUSE.

Prior to changing the batteries the mouse was dropping out and a window popped up and said something to the effect of change the batteries of the mouse will keep disconnecting- so I changed them. At first with brand new eneloop batteries that were fully charged. Then the issue started. SO I changed them to a couple brand new Duracells.

I'm using a mid 2009 MBP 13" with an external monitor and a Numark NS7/FX. I have a 1TB Time Machine.

I was coming here to post that solution. Good Job!

I was having the same issue. First set of batteries that came with the mouse were fine but once replaced, I've experienced the regular drop outs which were becoming extemely annoying.

Having read a rew posts and tried a couple of things, I believe the biggest issue is the battery contacts within the mouse itself. Some people have stated that you should use only 1.5v AA batteries which I'd agree with.

Having tried a couple of different brands I've discovered the best batteries which work great are from ALDI supermarket and are their Ultracell batteries. I'm using rechargables at present and after a week have only one drop out which was when I dropped the mouse on the desk. These batteries seem to be a little bit more chunky than other brands and seat much better within the mouse.

The other bonus is that they're cheaper than a lot of more know brands too. Worth trying before messing around with settings and plists etc.

Ok so I found a solution. And it works perfectly. Just insert a folded piece of paper over the batteries, and close the cover. <b>If</b> you get it right, (pretty difficult to get wrong) the mouse doesn't disconnect anymore. If you don't want to do that, but fat batteries. :D

It was definitely a battery issue for me too. Batteries differ in length, so the shorter ones move around and lose contact with the points, thus causing you to lose connection. I put my Energiser rechargables back in and no worries!

Yes, this is a battery problem. If you hold the mouse upside down and move the right battery slightly left-to-right, you'll see the green indicator light switch from solid to blinking. Pretty annoying to pay $1,200 on a new iMac only to have to stick paper in between the batteries.

Apple - if you're going to act like you're the leaders in design, then you have to get the basics down.

I had this problem, I upgraded to Lion last year (on my Mid-2011 21.5" iMac) and I was fine, but it started to drop out frequently when my batteries were low. When I changed my batteries last week, it was doing the same thing. I have tried many things to fix it, and nothing was working, so I made an appointment at the Genius Bar at my nearest Apple Store. They connected it to their MacBook Air, and it was still dropping out, so they replaced it for free. I am still under warranty, so I think that's why my replacement was free (they replaced it yesterday, and I have no animosity). Go to the Genius Bar for them to take a look, and if you're out of warranty I doubt the replacement fee will be high.

If you want to solve this permanently, purchase a Mobee inductive charger. No more batteries to run out, no more drop outs, and it takes 2 minutes to set up. I have my mouse magic back!

Magic mouse works most of the time, but then randomly loses connection to my 2011 iMac for a few minutes at a time. During this time, the computer becomes essentially unusable.

After this happened again in the midst of my responding to important e-mails at work, I smashed this piece of trash on a floor and just grabbed a no-name wired USB mouse from the shelf. If you ever use your computer for work, I highly discourage relying on this mouse and instead encourage to use a mouse that actually works.

I find a little sausage of Blu-Tack under each battery sticks them into their cradles perfectly. Don't put padding on the outside, it will curve the access door outwards, making it more likely to drag on your desk and even get permanently out of shape. Just glue them in!

Its really disappointing in Apple's part of the design but in some cases the batteries shift inside the mouse and loses contact on the +/-. I suggest putting a small, folded piece of paper to tighten the space inside the mouse 🙂 worked for me and now my mouse doesnt disconnect unexpectedly

Developed this problem with my mouse after a few months. I made little folds of aluminum foil and put them between the battery and the negative contact. That helped, but I still had an occasional drop out. Then I inserted a slip of folded paper between the battery cover and the batteries. This required some care to get just the right thickness to hold the batteries more securely without bulging out the battery cover. But this did solve the problem.

So you now have "Mickey Mouse". That's what Apple should have named it. Ever since I downloaded Apple Maverick I am having the same problem......and I see I'm not the only one.

Why can't Apple leave well enough alone. If it ain't broke don't mess with it.

I just purchased a Magic Mouse and was having the same problem right out of the box. My mouse would stay connected for a bit but as soon as I picked it up or moved it roughly it would disconnect. I saw all of the troubleshooting about using tinfoil and I was going to try that but then I had the thought that it may be the batteries. The mouse I ordered came with two energizer batteries already installed but I also purchased an Apple battery recharger with six batteries. So, thinking that Apple may have done what they are famous for doing and designing their product so that it would only work with their product (most of the time), I went ahead and put the rechargeable batteries in to see if it was a difference in batteries. After I put the rechargeable Apple brand batteries into the Magic Mouse it worked flawlessly, even when I jarred it or picked it up and set it down. I'm assuming that there may be a slight difference in battery size or something else between the Apple made batteries, to which the Magic Mouse may have specifically been designed to accomdate, and the standard battery size. So if my assumptions are correct a spacer such as the tinfoil, or whatever else others are using, is needed to fix the incompatibility. If these things are all true, I think it is pretty crappy on Apple's part to continue this campaign of product exclusivity and force their customers to buy only their products in the process. But like I said this may only be an isolated incident with me and I could be entirely incorrect. In light of all of that it seems especially weird that they would send me non-Apple batteries in the Magic Mouse.