Whenever you can, buy rechargeable batteries rather than disposable ones. Rechargeable batteries last longer, of course, but they can also be recycled, while disposable batteries can't. In general, never put batteries in the trash without checking with your local solid waste management district for any outlets for household battery recycling. Also, remember to inquire at local jewelers, pharmacies, or battery retailers to see if they'll accept button batteries for recycling.

For more information, check out this website: http://www.ehso.com/ehshome/batteries.php