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Widetronix Uses Tritium For 25-Year Power Source

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simple-beta

The image above is a simple betavoltaic graphic from medgadget.  It shows the beta particles creating an electric field over a pn-junction diode, biasing the device, which thereby causes conduction.

It has been some time since betavoltaic batteries have been used. Lithium Ion has been the battery of choice for awhile, probably because it isn’t, you know, radioactive. Widetronix is looking to change that with its Tritium-based, navy-funded technology. By using more efficient semiconductor materials, they have revamped the self-charging betavoltaic battery.

These tiny power sources are said to last for 25 years! Of course, this technology only works for devices that require minimal amounts of current draw (think pacemakers and small sensors).

Check this VentureBeat article for more on these tiny batteries.

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