I zinc this is a good idea
Zinc/air fuel cells for stationary and mobile power applications can supply power levels above 1 kW. In contrast to being discarded like a primary battery or slowly recharged like a secondary battery, a zinc/air fuel cell can be refueled within 5 min. The fuel cell is designed to displace lead-acid batteries where higher specific energy is important. A recycling/refueling unit supplies the cell with zinc pellets and removes zinc oxide, converting it into zinc metal.