Fuel cells that generate electricity via a chemical reaction between hydrogen and oxygen are emerging as an environment-friendly alternative source of power.
While they are used in a wide range of products, from motor vehicles to household power generators, a Tokyo company has found a unique application -- powering a robot guard and receptionist.
Sohgo Security Services Co., a major security firm, is currently developing a robot equipped with a fuel-cell battery that will work round the clock for one week without a recharge.