Switch to Eneloop AAA batteries. They cost more up front, but in the long run you'll save a lot of money (and avoid throwing away so many batteries).
You can buy the Panasonic BK-4MCCA8BA Eneloop 8-pack on Amazon for about $16. That works out to about $2 per battery.
The package claims you can recharge them up to 2100 times. I have a hard time believing that figure, but even if you recharge them just 100 times, that brings the per battery cost down to just 2 cents per battery.
Yes, you'll need to buy the additional charger, but that's a small investment for long term savings.
I've been using the Eneloops for a few years now. Unlike the old Nimh or Nicad rechargeables, I can charge these up ahead of time and have batteries ready to use when I need them. I have about a dozen AA and a dozen AAA, with about half of those in various devices around the house (remote controls, clocks, etc.).
I wish they made C and D cell eneloops (not just those little plastic adapter tubes) for longer life in lanterns and whatnot, but I have very few devices that use those battery sizes anymore. It would also be nice if they made 9V eneloops for smoke detectors.
Anthony Watson www.watsondiy.com www.mountainsoftware.com