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I'm sure this noob question has been posed....but why can't standard lithium ion battery packs be charged via swappable supercapacitor(s)?

Say there were a handful of receptacles on the Model 3 that accepted supercapacitors and then somehow transferred their charge to the battery pack. Is that not a method of obtaining a small amount of range while driving?

Imagine ubiquitous supercaps with 4 miles of range. Would be super easy to supply and consume, the pack could be almost constantly charging and require much smaller packs.

Nuts?

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