Battery Replacement

Focus On Fire Safety: Replace Those Batteries In Your Smoke DetectorsSince you set your clocks back this weekend, it's also time to change the batteries in your smoke detectors. The Detroit Fire Department is handing out free batteries for smoke detectors if you turn in your old ones.
Heart-Powered Pacemaker Could Someday Eliminate Battery ReplacementA new power scheme for cardiac pacemakers turns to an unlikely source: vibrations from heartbeats themselves.