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Currently the Article source-lessly expresses "Zinc-bromine batteries have energy densities of 75 to 85 Wh/kg." The Only Battery example given has however a 34.4Wh/kg (50kWh/3200lb). So the given Rating is +200% better that the only example the article gives. I'm changing it to 34.4 but it can be changed back if anyone can give a source or reasoning behind this. Larek (talk) 16:11, 27 July 2009 (UTC)
I Found where "75 to 85 Wh/kg" has been printed in several white papers, And I think may have originated from the Manufacture originally. But it never hurt to check you math. According to Energy_density#True_energy_densities "energy density of a complete system, including all required external components", This "flow" battery has pumps and tanks etc, so one complete functional DC battery (108V) weighs 3200lb (1451.49kg) and stores 50kWh -> 34.4 Wh/kg
I could not find most of the template's specs directly but I did find the required values to calculate them.