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New nickel-iron battery charges in seconds, survives 12,000 cycles
(interestingengineering.com)
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this post was submitted on 13 Feb 2026
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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!