Coin-sized nuclear 3V battery with 50-year lifespan enters mass production
Coin-sized nuclear 3V battery with 50-year lifespan enters mass production
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19 comments
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3V at 100 microwatts significantly limits its usefulness.
They say they're planning to make a 1W version, which I assume will be either be much larger or have a much shorter lifespan. How does it work? Does it have a way to stop the reaction or does the 1W battery generate 1W of heat when there's no load attached?
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I think for embedded iot type apps it could be great, pair it with some caps for peak loads (read/transmit).
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Some microprocessors in deep sleep mode can consume less than 100 microwatts, so I guess it could be possible with this version, but you'd need to charge for a long time. The power consumption of an active ESP32 can reach 700,000 microwatts.
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I have some environment monitoring units that run on cr32 that last around 12 months (not ESP's ;) )
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I agree that's low. claim of 3300mWh per gram, also has decay over 50 years. 100 microwatts over 24 hours is 2.4mWh. 600 microW solar for 4 hours is the same. 1 cm2 solar is 25mW, and so more daily power with just 6 minutes of sun per day.
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19 comments