>I suggest investing in rechargeable batteries.

and not just for mice, but damn near everything in general

i been using the same 4 shitty $15 maxell rechargeables in my wireless keyboard and wireless optical mouse for damn near going on 7 years now

these batteries even outlasted my original wireless mouse (replaced it about 6 months ago with a wireless logitech thats pretty easy on the battery consumption... only have to recharge like once every other month)