i used sanyo eneloop rechargeable battery.
The magic mouse works fine here. No lost connection. It does eat batteries, but I keep a recharged set handy, so when needed, I simply reload the rodent and recharge its failed entrailles.
However, I keep a corded mouse in the back of my paraphernalia, just in case the sensitive critter had a nervous breakdown.
Karen : I wish your problem with the left click is just a mouse issue, and that it will be solved right away.
It was the trackpad so now all is well thank goodness!!!
- Karen