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Gel and lithium-ion tech could enable 1000-mile EV range on one charge
(interestingengineering.com)
This is a most excellent place for technology news and articles.
If other companies do it then it is possible, would love to get extra range on my Chevy volt
Those volt/bolt battery packs are a really neat design, but pretty densely packed, especially the cooling system.
I know a lot of conversions that use the volt/bolt packs, but to put different batteries in a volt would likely take a lot of custom fabrication and probably compromises in interior or storage space.