terminhell , 4 months ago

My grampa had a pacemaker that was.

Edit: Source - https://osrp.lanl.gov/pacemakers.shtml

Edit2: For the smoke detectors, i know its not what powers it per se, as far as the electronics that sound the alarm and such. More pointing out it contains radioactive material, and is something in every (hopefully) house, and you likely walk by it often.