I was recently changing the batteries in another Apple wireless keyboard, and I realized that they seem to go through batteries pretty quickly. I noticed on one machine, an iMac it goes through batteries about once a month. I keep going into the econo monster battery package to get new ones. Soon after I grabbed the last pair for that keyboard I realized that this had something like 50 batteries in it and now its empty, and I just bought this 2 months ago? So last time I was at the electronics mega store I passed by the rechargeable batteries and thought seems like a good idea. I never really thought about how many batteries we all go through in a year, and where they end up. Doing a mental inventory I thought what runs off of batteries in the home and office? There's the wireless keyboard(s) and mice, there's the TV remotes at home (although they usually dont go bad for months), and whatever else like a Wii ( they eat batteries monthly too). So that's two AA's or AAA's per device. All these batteries end up in the landfill eventually and that just can't be good in the long run. Even though it says do not throw away in trash right on them they always end up in the trash can. Unfortunately who doesn't just drop dead batteries in the trash without a second thought? So it seems like a waste of money to keep buying batteries to always keep replacing them when I can just get a niflty battery charger or a few of them and just use rechargeable batteries. Plus it seems to be environmentally friendly. Does anyone out there use rechargables? If so how often do you have to swap them out to recharge and what do you recommend?