Home depot will take your used CFL light bulbs and used rechargable batteries

CFL light bulbs contain mercury and area illegal to drop in landfills. You can drop those as well as rechargable batteries (all kind including power tools, electronics, etc.) at Home Depot. Their east bay locations are 1037 Arnold Drive, Martinez, Ca. 94553 - 2090 Meridian Park, Concord, Ca. 94520 - 2750 Crow Canyon Road, San Ramon, Ca. 94583 - 1625 Sycamore Drive, Hercules, Ca. 94547.