3 ms·

Lithium batteries already beat this on every metric and aren't exotic. http://www.tadiranbat.com/long-life-xol.html http://www.tadiranbat.com/long-life-xol.html

• gitgud 7y ago
  I'm pretty sure Lithium batteries don't produce continuous power for 20 years...
  • dogma1138 7y ago
    Non rechargeable cells can have that lifetime.
    • zaarn 7y ago
      I doubt at -40C to 80C.
      • dogma1138 7y ago
        Then you doubt for no reason these ones form Energizer are -40 to +60c.. https://data.energizer.com/PDFs/lithiuml91l92_appman.pdf https://data.energizer.com/PDFs/lithiuml91l92_appman.pdf And quick googling shows batteries with a wider positive range.
        • zaarn 7y ago
          If you scroll through that PDF you'll notice the temperature capacity chart. At -40°C you're going to have to limit your power drain a lot to get rated capacity. At low temperature the chemical reactions get too slow to take advantage of the full capacity of the battery, that's simply a reality you can't get around. A "betavoltaic" would deliver full rated capacity at any temperature, regardless of changes or duration.