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A few days ago, talking with a worker of the local water and wastewater utility in my hometown while he was taking a break from work, and I was taking the dog for a walk, he said something about solid-state batteries which could be a good upgrade for current generations of EVs on a foreseeable future. I told him the only solid-state accumulators I knew, which are commercially available by now, are capacitors, which unfortunately don't retain charge well enough for longer times as a battery does. Well, unless some companies which already use EVs as service vehicles renew their EV fleets fast enough to retain some residual resale value and avoiding the battery losing its ability to retain charge, I could expect some EVs being worked around with lead-acid Optima batteries, despite their weight and volume...
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