Rechargeable batteries are a highly efficient means for storing energy. For battery-electric cars, lithium-ion and similar battery systems allow high drive ranges and short charging times. However, their use within the automotive sector is constrained mainly by high costs, a limited service life and safety issues. A new concept provides an alternative, in the form of a zinc-air battery. The necessary oxygen for discharging the cell is provided by the surrounding air. This leads to significant weight savings and the high, specific energy of this battery type.