Mouse loses connection

I have a Mac Mini and a few months ago I started having problems with the Magic Mouse losing its connection to the computer. If I wait a few minutes it comes back but in one hour it may drop the mouse 3-4 times. I have used new batteries and even went to the extend of buying a new mouse thinking that it was my old mouse. But that wasn't the problem because this is even happening with the brand new mouse. What I notice first is that the mouse's responsiveness starts to change--it isn't as responsive. Then the next thing I see is "Connection Lost." I have gone into Utilities and have checked that the disk is OK and all my permissions are right. I was thinking of simply reinstalling the OS but would like to see if others have suggestions. Also, I don't know if this is related or not but I have a wireless printer that seems to work fine for a while and then it too will drop the connection and the printing will stop only to restart a while later. Suggestions?

I might have actually figured out the problem. Even re-installing the OS did not help. I still got printer errors and my mouse still moved real slow at times and would lose connectivity. So I hard-wired the printer to the network and turned off the WiFi on the printer. I still got "communication errors". Then I turned off WiFi on my Mini (it is hard wired to the network), uninstalled the printer, rebooted and reinstalled the printer (although I kept WiFi off for now). The mouse has worked perfectly well for over an hour and I have printed numerous documents with no problems. I will let this run for another day and if all is well I will turn WiFi back on on the printer. But for now it looks like running the WiFi on the Mini was causing the problem.
Thanks for the suggestions, Illaass. They helped getting me to think about conflicts. I do want to look at my router and see if I can set it to only run on the 5 GHz bandwidth and see if that helps. But I don't need WiFi on the Mini so if keeping it off solves my problem then I am happy.

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Regards
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There's already a thread on this with almost the same title:
Magic Mouse Loses Connection
One idea (discussed in that thread) is that not all batteries are created equal in that the positive terminal varies in size among different brands and "flatter" ones are not making contact all the time. One solution was to add a little ball of aluminum foil between the negative size (I assume) to take up the "slack".

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My Magic Mouse tends to lose its connection whenever I give it a tap on the table. I mean, it's normal right, when you lift the mouse a little bit and tap it to the surface to give the pointer a little more distance like browsing the web or playing a computer game. My Magic Mouse seems to lose its connection everytime it gets a minor tap on the table and no, I don't slam it hard.
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Actually I believe it is a battery problem. Specifically, not all batteries are created equally and vary from brand to brand so with the tolerances as tight as they apparently are in (or are not) in the MM the positive terminal does not always make contact with the MM terminal.
Based on other posts in these forums the positive terminal varies slightly among brands. Some are higher than others. It's a minor amount but it appears to be enough.
I've seen this with my neighbor's MM. Brand new batteries (forget the brand at the moment) yet I could shake the MM and have it make and break contact. On the other hand I don't have the problem with my Sayno Eneloop rechargeables.
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Related discussion: Magic Mouse Loses Connection

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Hardware Information:
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          1 3.06 GHz Intel Core i3 CPU: 2 cores
          4 GB RAM
Video Information:
          ATI Radeon HD 4670 - VRAM: 256 MB
System Software:
          Mac OS X 10.6.8 (10K549) - Uptime: up 15:12:55:28
Disk Information:
          WDC WD5000AAKS-40V6A0 disk0 : (465.76 GB)
                    (null) (disk0s1) <not mounted>: 200 MB
                    Macintosh HD (disk0s2) /: 465.44 GB (395.26 GB free)
          HL-DT-STDVDRW GA32N
USB Information:
          Western Digital External HDD     111.79 GB
                    MELS EXHD (disk2s1) /Volumes/MELS EXHD: 111.79 GB (52.81 GB free)
          Apple Inc. BRCM2046 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Internal Memory Card Reader
          Apple Computer, Inc. IR Receiver
          Apple Inc. Built-in iSight
FireWire Information:
Kernel Extensions:
Problem System Launch Daemons:
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Problem System Launch Agents:
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Launch Agents:
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User Launch Agents:
                 [loaded] com.adobe.AAM.Updater-1.0.plist
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User Login Items:
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Internet Plug-ins:
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User Internet Plug-ins:
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Hey Apple Discussion Members,
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Message was edited by: jeffbrooks

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thv2011,
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Captfred

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Thanks to leonie for some information contained in this.

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Look at the threads in More Like This at the right.
One general theory is that different makes of batteries have slightly different length positive terminals and loose connection. Some find adding a small shim of aluminum foil to keep the batteries from moving works. Others just a piece of paper to push down and serve the same purpose.
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AirPort and Bluetooth: Potential sources of wireless interference

Mouse loosing connection

I recently purchased a 27" iMac, which I love.
However, I am having some serious mouse issues. It constantly looses connection and just stops working till it reconnects which is anywhere from 1min to 5mins.
It's very annoying. What could be the problem? Is it something I can fix or is it maybe a defected mouse?
Any advice is appreciated
Thanks,
Jon

Depending your your point of view it could be considered "defective". Problem is you are not alone. There are many posts on the, er, deficiencies, of the MM. Google "magic mouse looses connection" and look at More Like This section on the right. Here's a 15-page thread on this topic in these forums:
Magic Mouse Loses Connection
Some of the problems appear to be a poor transmitter/receiver. Others seem to be due to problems with the batteries used. For example, different makes of batteries have slightly different lengths of the positive terminal (end with small "nib"). The tolerances are such that the slight length difference is enough to make the battery loose contact wth small movements of the batteries. Some have found putting a small aluminum foil ball inside to take up the "slack". Others have found different brands of batteries are less prone to the problem since they have larger positive terminals.
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Mouse loses connection

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