Magic Mouse won't turn on AT ALL.

Same problem here. I tried a couple sets of Duracells and no green lignt. Then I pressed in fairly hard on the middle of the batter door and bingo -- green light on. I just had to re-connect to that mouse and now all is OK

Thanks vermonter! When fresh new batteries doesn't work, the pressing in the middle did the job!!

Wow, this is interesting. I had the same problem, applied vermonter's fix, and my magic mouse works again! Something our beloved apple boffins should look at, methinks.

I'm having the same problem. Just tried some new Ray-O-Vac's & the local grocery store brand, neither of which worked. In looking at the positive terminals, they are slightly shorter than the ones that are almost dead (cvs store brand.) I guess once you find a brand that works, stick with it. Still seems like something of a design flaw in the mouse that it is that finicky. Don't think I've ever had a similar problem.

strange solution but worked straight away!

Weird I use the energizer 2300mAh batts and they work great.. it was when I switched to Duracell that it didnt like it. Maybe its high time someone designed a rechargable battery pack which slots right in and likes the power mat 😀

I have put in a few different batteries and also tried every solution that people have surgested and still nothing. Shall I take it to the Genius Bar at the Apple Store? I think that its dead to he honest...

Just had the same problem, although every now and then I could get it to work it then went onto drop connection and switch off.

After multple battery changes removal and reloads etc etc I have found the problem.

The battery compartment is too big for most batteries! As the mouse sits on your desk gravity moves them ever so slightly and disconnects. This is not noticable by just looking.

The solution? Get a piece of paper, fold it 2 or 3 times, trim it to the exact size of the 2 batteries, lay it over the batteries, reattach the cover and hey presto! A working mouse.

The best brains in the world, working on cutting edge technologies and a bit of scrap paper saves the day. Heads should roll. Get you act together Apple!

THANK YOU SO MUCH this post has saved me £40!

i was just about buy a new mouse this seach was my last attept to fix it!

cant believe it was just the fact its fussy about battery type, kodak are a no no!

I had the same issue and noticed that some brands of batteries don't quite make contact as the positive end of the battery doesn't stick out enough to reach the contact 😀

I took mine back several times before I twigged LOL

I can't believe that this mouse is so sensitive. I had the same issue where I put in fresh batteries and no green light. Lo and behold, I had put in a different brand. My mouse does not like DURACELL. I swapped them with ENERGIZER and bam! My mouse LOVES ENERGIZER. Green light, good to go. So check your battery brands and get the ones that this little picky mouse likes! Thank goodness I came across these posts or I would have been out buying yet another $70 piece of mouse.

Found a solution that may work for all those that have this issue, And you can utilize the batteries in which you have already.

Just fold a small piece of foil into a square and place it on the top of the positive end of the batteries

and place the batteries in and bingo, a working mouse.

Can be a bit of an hassle but it works....cheers

Thanks to DeathCubeKX for the original post and to all who responded. My mouse wouldn't turn on with Duracell batteries (nor with little pieces of aluminum foil added to the positive end). After reading these posts, I ran down to the local pharmacy and bought some Energizer batteries, and now the mouse works like new.

I spoke too soon. The new batteries only lasted about an hour. When I left the mouse alone, and returned, it didn't ever come back on. I will go out an buy yet another brand/kind of battery. This is getting ridiculous. Thanks for everyone's posts.

Thanks! I had the same problem. Apparently the battery door is going south. Pressing on it connected the batteries.