Batteries wearing out too quickly?

"I don't turn off my Magic Mouse at night - it should go into sleep mode automatically.

I'm still on my original set of alkaline batteries with the Magic Mouse I recently got with my 27"" iMac (just over 3wks now) so I can't say for sure how battery life is yet with the new MM. But I have heard reports the battery life isn't so great. however...

FYI for a few year's I've been using the predecessor - the wireless Mighty Mouse. here's what I do - I use Sanyo Eneloop rechargeable batteries, these are NiMH batteries with extremely low self-discharge rate (they say 85% charge retained after a year on the shelf). by comparison regular NiMH cells discharge a percent or so per day.

I have 1 pair in the mouse and another charged pair always at the ready in my desk to swap out when needed. It's not practical to do this with regular NiMH cells, I've found them to lose their charge too quickly even when the mouse is asleep, and the spare set in my desk would always be low on charge once they were needed. Since switching to Eneloops I get many weeks of life out of them before recharging and the spare set are always charged up. I recommend anyone with a bluetooth mouse to give them a try

it's possible that the new Magic Mouse is more power hungry than the old mouse, with that big touch sensitive surface. I'll see how it compares when my original alkalines die, but I'm thinking this 2 pair of Eneloop system will continue to work fine for me."

fold up 2 thick square pieces of aluminum foil (one for each battery-kitchen foil will do) and place them on side of metal terminal (spring loaded ). I read about that somewhere and found that to be a huge improvement in my mouses performance. At first i was skeptical but trust me, if you have problems with your mouse you'll be surprised how simple it was to get the best of it. (btw it fixes connection problem as well)

I bought a 21" iMac in 2012 and it obviously came with a new battery set which I didn't have to change even ONCE for the next 20 months! I don't know what kind of batteries they put, but I've been going through a set of 2 in 4-5 weeks ever since. If anybody gave me a pointer as to what exactly I should check on my computer to see what is draining the batteries so fast. Muchas appreciado!

I'm a new MAC user (for a year now) and I've also had to change batteries way too often - once a month, and I am not using my computer all day. I am out to get rechargeables as I used to do with my PC. disappointing

I have a one year old 21" MAC and just changed the mouse batteries for the first time. Don't do anything special, mouse spends most of it's time in sleep mode. The more you use it the faster the batteries are going to drain. If you are unhappy with burning through batteries I would suggest getting a couple sets of rechargeables.