Aqueous battery

An aqueous battery is an electric battery that uses a water-based solution as an electrolyte. The aqueous batteries are known since 1860s, do not have the energy density and cycle life required by the grid storage and electric vehicles, but are considered safe, reliable and inexpensive in comparison with the lithium-ion ones. Until 2010s they also had an advantage in high-power applications (like cordless power tools), but this was overcome by developments in the Li-ion chemistry.

This article is about a generic battery type. For a lithium-ion battery, see Aqueous lithium-ion battery.
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