Zinc-Air primary cells have about twice the energy density of Li-ion cells. https://en.wikipedia.org/wiki/Comparison_of_commercial_battery_types https://en.wiki

Zinc-Air primary cells have about twice the energy density of Li-ion cells. https://en.wikipedia.org/wiki/Comparison_of_commercial_battery_types https://en.wikipedia.org/wiki/Comparison_of_commercial_batte...