Pretty sure they have good reasons, wikipedia lists low energy density / high areal costs and the need to be fully discharged. https://en.wikipedia.org/wiki/Zi

Pretty sure they have good reasons, wikipedia lists low energy density / high areal costs and the need to be fully discharged. https://en.wikipedia.org/wiki/Zinc–bromine_battery https://en.wikipedia.org/wiki/Zinc–bromine_battery