Show sample as: 72-frame QuickTime VR or 360-frame QuickTime movie loop.    My periodic table poster is now available! Pacemaker. (External Sample) I have an empty nuclear thermoelectric battery designed to go in a pacemaker like this, but this one is the whole deal. Museum's listing of this item. Location: Oak Ridge Health Physics Museum Photographed: 15 April, 2009 Text Updated: 15 April, 2009 Size: 3" Purity: 0%