Why does magic mouse keep disconnecting?

Glad the steroid batteries worked for you, Talk2. I myself use plain old Duracell on my Magic Mouse (which I bought in 2010). I never use anything but Duracells. I sometimes have a problem with my Magic Mouse, but rarely do. I have more of a delay, where my curser hesitates. It's frustrating. Only once did my mouse simply not work. I twirl the batteries, and that usually fixes it.

Maybe try Duracell and see if that makes a difference. If not, you haven't invested in any loss. Let me know if Duracell works for you.

I use my Magic Mouse with my MacBook. Upstairs is my iMac (2006), and my wireless mouse (also 2006) just stopped working. iSad. I changed the batteries, and NOPE. Do mouses just die? I wonder if I should buy a new one. I fear it won't work. I'm using a wire-mouse. Ick.

Wouldn't it be cool if you could keep your computer forever, and all the updates you buy simply improve your software without changing it too much? I should keep on dreaming, huh.

I really appreciate this thread! I had the same thing happen with my mouse. It would suddenly disconnect and then reconnect. Before I read this thread I had been thinking..."I just changed the battery. I wonder if I'm going to need a new mouse!" After I read this I changed the batteries and have had no trouble since. I changed from Duracell to Energizer. I could see a difference in the height of the contacts from Duracell to Energizer. It was an easy fix and I'll just use Energizer from now on. Hopefully they won't change, since I have used Duracells in the past with no problem.

If your mouse is the same as mine, the right hand positive terminal can move back inside the casing, whereas the left is fixed. You can try this by gently pushing a pencil on the terminal. Silver foil/aluminium in this "hole" will help, but the terminal can still move back and so will not always make a "good" connection.

The best solution would be to open up the mouse and put something behind the terminal. However, as the mouse is glued together, this makes it difficult.

Thank you for this solution. My mouse has been disconnecting from my Mid 2011 iMac for sometime now and recently it disconnects more than connects. I will definitely give this a try. I got so tired of it that I just recently ( 2 days ago) bought a regular Apple mouse because it was driving me nuts. Maybe I will return the mouse I just bought from Best Buy since I prefer the magic mouse. The older ones just don't have the same feel. Hopefully Apple will correct this problem with future mice.

I never had any problems when I was using Duracell gold top batteries, however, when I switched to Duracell Quantum the problem started. I am now trying

the tin foil to see how long it works.

Okay, I have read through all the fixes. I use Energizer Lithium batteries. I have two magic mice and both of them started losing connection at various times throughout the day. It is so frustrating because there is no way to reset this quickly. If I try the aluminum foil folded up do I put it on the positive or negative side?

Update: I folded a tiny piece of aluminum foil and inserted it into the recess of the positive side, but then the batteries were unable to supply power. The green light never came on. What am I doing wrong?

Okay, I have read through all the fixes. I use Energizer Lithium batteries. I have two magic mice and both of them started losing connection at various times throughout the day. It is so frustrating because there is no way to reset this quickly. If I try the aluminum foil folded up do I put it on the positive or negative side?

Update: I folded a tiny piece of aluminum foil and inserted it into the recess of the positive side, but then the batteries were unable to supply power. The green light never came on. What am I doing wrong?

Read an article and says to wrap a SINGLE thickness of aluminum foil around the negative "bumps" on the mouse and wedge the batteries over the foil-covered bump. This worked for me.

Not so Fast UPDATE: Mouse started heating up after adding the foil and I had to quickly remove the foil before I started a fire. I was using lithium batteries.

Thank you very much for this answer, this issue has been disturbing me for the past few months, I suspect there has been a change in the battery design, specifically the flange around the outer edge which pushes the battery away from the connector.

Truly Helpful.

I rarely have trouble now that I am only using Energizer Lithium AA batteries. Pam

I have heard every kind of fix to this problem there is, and the solution is so simple it's crazy. I've heard complicated theories like reloading your software, to sun spots, but I have tested all of the great advice on this thread, and the answer is clear: It's the failure of the batteries to connect to the terminals firmly enough. THAT'S ALL. Just take a little square of aluminum foil, fold into into a few layers, insert it between the negative pole and the Magic Mouse contacts, and... VOILA!!! You'll never have this maddening disconnection issue again.

The only thing that really bugs me is why we should have to suffer through this obviously common problem with the supposed greatest computer hardware on planet earth, when the long-term solution for this problem could so EASILY be fixed. Someone at Apple needs a serious kick in the ***...

Thank you ascendi!!!! This worked perfectly, after months of frustration and pulling out my old microsoft mouse to use out of desperation!! thank you thank you

I have experienced the same problem with my Magic Mouse for the last few days. I had never had any problem at all with my mouse, but it suddenly drove me crazy these past few days. Before inserting the foil I had cut per Ascendi's recommendation, though, I took my mini LED flashlight and inspected the positive and negative terminals. I found a fair amount of a film there...probably s bit of slight surface corrosion. Not rust, and not leakage from the batteries...just a thin film. I got a Q-Tip and some Isopropyl alcohol, and swabbed both positive, and both negative terminals. I also swabbed the terminals on both batteries, since they had just been taken out of the mouse. The mouse has been working perfectly for a while now, with no "Lost Connection" message. There was a noticeable difference in the appearance of the terminals after the swabbing. Since I've been using this mouse for several years without ever having had this problem before, it just seemed logical, even after reading the suggested solutions, that a film might have formed on the terminals...just as it does sometimes on flashlights, and flashlight batteries. This might be the simplest solution of all, so I hope it works for everyone else who reads this.

- E9Buzz

I had a similar issue with my Magic Mouse and solved the issue with the purchase of Apple's Rechargeable Batteries. Problem solved and its been over six months. I believe the charger and six batteries cost $30. The Return on Investment (ROI) should reached within two years, considering I use the batteries in both the mouse and keyboard. Plus, performance has been flawless.

I too have had this problem. My solution is that the connection issues for me were caused by my cordless telephone base unit being too close to my computer. I wasn't told that a cordless phone base unit can cause interference with Bluetooth devices. Since moving the base unit, no more lost connection of my Bluetooth devices. RRR

The following works for me. I clean with alcohol using a Qtips, the batteries terminals and the circular window ( I assume is the detector). But as a bad experiment I also change the batteries. I am about 2 hours and no connect/disconnect message.