Reminds me of the light bulb that has lasted for like a 100 or more years in a fire house in San Fransisco I believe? They aren't sure how the person was able to make it or something. Technology just like that and this battery that has been lost in time.,(reply>), The world's longest-lasting light bulb is the Centennial Light located at 4550 East Avenue, Livermore, California. It is maintained by the Livermore-Pleasanton Fire Department. The fire department claims that the bulb is at least 116 years old (installed 1901) and has only been turned off a handful of times.,(reply>), If you look up the operating conditions of that 100 year old light bulb you will find that these days (the last 30 years?) it's been running at reduced voltage (under 50 volts?) to help extend it's life. Also consider that bulb is (was?) made as a 100 watt bulb but puts out less light than a 25 watt incandescent. IOW, it's got a heavy duty filament and is very inefficient by today's standards.