Sunday, April 04, 2021
BATTERIES HAVE come a long way in 30 years. In the early 1990s the storage capacity needed to power a house for a day would have cost about $75,000. The cells themselves would have weighed 113kg (250lbs) and taken up as much space as a beer keg. Today the same amount of power can be delivered at a cost of less than $2,000, from a 40kg package roughly the size of a small backpack.
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