I'm using Energizer and so far it's work fine. Already use 1yrs ++.

On my hand energizer batteries (non-rechargeable) can last up to 1 month. Other batteries only two weeks. Now I'm using one of those induction charger. A bit expensive but in the long run really worth it.

Now me using Sanyo XX Eneloop 2500mAh, it last longer than my previous Enegizer 2450mAh.

I just bought magic mouse last month

Sometimes the cursor didnt follow when i move the mouse
Is it the hardware prob?or the battery is loose?

either eneloop or energizer.

never go for eveready though. m.mouse contact is very sensitive. somehow eveready batteries the contact at the +-ve terminals so loose. got lot of mouse disconnected during used.

changed to energizer after that, problem solved.

I think it's just laggy. If battery loose you will lost connection with your magic mouse

No Worries la like NoKusshon said, it always lost connection once in awhile. common problem for magic mouse.

BTW I am a heavy user for this, my best choice for rechargeable Sanyo eneloop 2Hrs Quick Charger is good for this mouse. This mouse drain battery like a dracula.

Eneloop ftw. Actually Eneloop = Apple (rechargable battery). I use POWEREX to charge and calibrate my batteries. It's important to identify dying batteries.

Does MR.DIY still sell cheap rechargable batteries?