Mechanically rechargeable, zinc-air batteries have been tested in Europe in postal trucks [41]. In this system, spent zinc anodes are removed from the battery and electrochemically reprocessed. A replacement battery containing charged anodes is loaded into the vehicle to minimize refueling time. Although a recycling process has not been designed, the battery materials are non-toxic and should be easy to handle. The cells do contain KOH electrolyte that would have to be neutralized. Besides the zinc anodes, which are continually recycled during the life of the battery, the materials of construction are steel, carbon, plastic, copper, and nickel. No recycling cost estimates have been made, but the recovered materials would not be very high in value so the process would have to be inexpensive to be economically viable.

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