I've got a question for all you that use the wireless mighty mouse. I got my iMac in the middle of January and the batteries lasted four months. That seemed pretty good to me, so I replaced them with some Duracells. Those lasted a month. They weren't new, but they were never used. I figured they sat around too long. Anyway, I replaced them after they died yesterday with brand new Energizers and today it tells me they are at 89% now today. I've had them in for less than 24 hours. Is this normal? What type of batteries do you all use? For the record, I'm not all bent out of shape and if I only get a month out of the batteries I'll live with it, but I'd like them to last a little longer. Seems like they should last, it's just a mouse. I do turn it off every night. Thanks for the input.