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New nickel-iron battery charges in seconds, survives 12,000 cycles (interestingengineering.com)
submitted 8 months ago by to c/technology@lemmy.world
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[–] 31 points 8 months ago* (6 children)

Sometimes it's not pure bullshit, but instead intentionally misses details

Like articles going "new battery lasts 1000 years in one charge!" - which is true of Nuclear Batteries, because they give basically a maximum of 1 watt of energy per hour. (Which is useful for very specific purposes like a pacemaker)

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  • [–] 2 points 8 months ago (2 children)

    Nitpick perhaps, but watts are not a unit of energy.

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  • [–] 2 points 8 months ago* (1 child)

    Y'know, I had a feeling I put the wrong unit and then was like "nah... Sounds right", I should have went with my first instinct

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  • [–] 3 points 8 months ago

    you can think of the units of measure as multiplying and dividing sort of like the numbers themselves.

    So if the nuclear battery continuously delivers 1 watt...

    In one hour it would have delivered 1 Wh or watt-hour, because 1W * 1h = 1Wh.

    And it works in reverse. If it takes 2 hours to deliver that 1 Wh? That's 1Wh per 2 hours or 1Wh/2h=0.5W!

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