Supercharged with solar power – a heavyweight battery would be a car accessory. Environmentalists advocate less mining - therefore small battery, possibly of the size of a wristwatch would be perfect for the job with a city car, or smartcar. Just as you sometimes carry snow chains on a long trip, you could also take a heavyweight battery, BESS fuel. City lights at night must have some energy, whether is it possible to maintain minimalistic battery size, all-night drive, and sufficient speed remains to be seen.
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