Magic Mouse keeps disconnecting from bluetooth

I experienced a similar problem with my magic mouse. It would intermittently disconnect and reconnect to my computer. I did some Googling and three possibilities floated to the top of the list:

1. A software switch set to disconnect the mouse with jarring or lifting, activated via the surface tracking mechanism.
2. Interference from other wireless devices disrupting the bluetooth connection.
3. A loss of power due to the batteries losing contact inside the mouse whenever there was a jarring movement.

I couldn't find any software updates that would fix the issues. Only a lot of speculation and name calling going on, but no real evidence it was a software related issue.

I did some reading on the radio frequencies and devices that can interfere with bluetooth connectivity. It's technical but this didn't appear to be the issue either.

So, I simply shook the mouse around a little and noticed the batteries made a little clicking sound, indicating they were floating just slightly inside the mouse's battery compartment. Turns out this slight movement afforded the batteries to lose connection with the metal contacts inside the mouse when it was jarred. This, my friends, is why the Magic mouse disconnects and reconnects. :-)

The fix was to cut out a think piece of paper and insert it between the thin aluminum bottom plate and the batteries. This holds the batteries firmly in place, preventing them from moving about and randomly disconnecting. (See attached image)

Blessings,

Heath Gerlock

the solution is simple and it has been working flawlessly ever since. Cut a piece of paper to the battery size rolled on it , and insert in the MM and cap it. from there onwards it is working flawlessly, some say using energizer battery is also the solution.

Not sure about that.

Has anyone considered the actual design of the battery compartment of the magic mouse? Both spring prongs are on the bottom of the mouse when held upright, so when tapped the weight of the batteries will push the prongs down creating a temporary loss of power. I don't consider this an issue as the mouse is less likely to be used in a vertical position in the real world unless you are trying to scrape it across your screen.

I did have the same problems mentioned above however, and I found that some batteries disconnected while others didn't. Price didn't matter as the Ikea ones worked great, except they ran flat faster than the ultimate super dooper energiser lithium ones. What I found was that some had numbers printed on the negative terminal in ink. Once I sanded it off the problem was solved for me. I think that the mouse's connection pins for the negative termials (springy ones) look too good to be functional compared to the traditional spring ones you find everywhere else. The flat suface is not ver forgiving and the tension is too weak to keep the batteries in place when "shaking" the mouse.

The paper wedge simply holds the batteries in place so it doesn't rely on the strength of the springs. I am surprised Apple haven't figured that one out and keeps sending replacement mice to people.

I too have been experiencing the intermittent disconnect issue; upon examining the internal battery connectors I noticed some residual deposits (most likely corrosion); a quick cleanup with some Isopropyl Alcohol on all the terminals and, touch wood, no more disconnects!

Worth a check, worked for me...

Great thread. The jarring lightly on the mouse's "tail" reliably and repeatedly forced a temporary disconnect for me, too, which the mouse would sometimes recover from but sometimes drop out permanently.

My solution is to wrap each battery in a length of sticking tape. Works a treat. No more rattling battery, no more tap to disconnect. Now it's perfect!

It may be worth sticking some gaffer tape into the base of the battery well for a more permanent solution.