https://www.naturalnews.com/2020-10-08-a-truly-versatile-crop-hemp-batteries-can-be-a-more-powerful-alternative-to-graphene-or-lithium-batteries.html (https://www.naturalnews.com/2020-10-08-a-truly-versatile-crop-hemp-batteries-can-be-a-more-powerful-alternative-to-graphene-or-lithium-batteries.html)
Yet another use for hemp and I imagine it would be cheaper than the current cost of graphene based batteries.