As the amount of electronics in my home climbs my need for AA and AAA batteries climbs as well (some of our more frivolous battery eaters: wireless electronic grill thermometer and electronic meat thermometer, trivia game for the PS3 that needs 2 AA's per wireless buzzer, wireless mouse - 2 of them, etc.) . Until wireless electricity is a reality in our homes, rechargeable batteries are the best way to save money while saving the environment from toxic batteries entering the waste stream. And as you have figured out by now I don't like waste, and I especially dont like discarding potentially toxic material which is why the rechargeable batteries I do recycle I take to an electronic recycler.
If you're still purchasing the regular old one-time use batteries I have on question for you: Why? Why are you throwing your hard earned money away after 300 hrs (give or take) of watching TV and the battery hogging remote.
Rechargeable batteries are truly a no-brainer. Yes, rechargeable batteries require you to *gasp* actually make the effort to charge your batteries after your done with them, but I think you can handle that little piece once I show you how much money these little puppies will save you!
The "rechargeable battery calculator" below compares money spent on rechargeable batteries vs. the regular old "pump and dump" batteries ( I made that term up. Watch out Energizer Bunny.) As you can see, you save TONS of money by buying rechargeable batteries vs. the standard kind.
For the comparison I am using the Duracell Value Charger With 4AA Pre Charged Rechargeable Nimh Batteries (which I own and use) and your standard one-time use batteries. The costs I use in the calculator are straight from the Amazon pages. Feel free to edit these costs based on what you can buy your battery/charger for.
Duracell claims that the batteries can be "charged hundreds of times" but for the calculations below I was conservative and just used 96 times for battery usage. One "use" equals the draining of one battery. Therefore "96 uses" equals using 96 batteries 1 time, 1 battery 96 times, 4 batteries 24 times, etc. The cells in blue are for you to edit based on your scenario. The electricity usage values of the battery (left side of calculator) were taken off a rechargeable Duracell AA.
So there you have it. In the case above you would save almost $100 dollars just by using rechargeable batteries! I only compared 96 uses, but many people will use many more than that, and the savings will only get better. Not only that, you are also helping your local environment. Seriously, it's time you bought a battery charger!