Well if they’re rechargeable, stop sneaking around and get them to the recycling center. But if they’re not, there’s not all that much you can do with them other than toss them – as this video full of very silly actors explains.
UNLESS you’re in some states, like California, where it’s against the law to dispose of batteries in your everyday trash. If you’re in one of those states, you need to check out Earth911.org to find out what you ought to be doing with all those batteries.
Just don’t feed them to a duck or a cat, which is what a lot of YouTube commenters claim to be doing with them.