According to Royce Kurmelovs at The Guardian, the group has so far developed water-based prototypes of coin-sized batteries used in clocks, as nicely as cylindrical batteries similar to AA or AAA batteries. The group is working to enhance the vitality density of their water batteries, to make them comparable to the compact lithium-ion batteries discovered inside pocket-sized gadgets. Magnesium is their preferred materials, lighter than zinc with a larger potential power density. F magnesium-ion batteries could be commercialized, the technology may substitute cumbersome lead-acid batteries inside a couple of years. Every yr, the reporters and editors at MIT Technology Review …