A dispenser and a means to be held by the dispenser. In order to increase efficiency, a compressed oxidizing gas is cooled to a second temperature T2 before passing through the first device for storing thermal energy, and the oxidizing gas is then increased, in one step, to a third temperature T3 when passing through the first device for storing thermal energy. The electrode material has a fine grained structure with fine grains having a mean size of <500 nm. Concurrent operations are executable in multiple banks to improve performance. In response to operation at the high current mode being complete, the power supplies are operated at a normal mode to provide a normal current at the normal current mode. Also a part of the invention are nucleic acid molecules which encode these peptides, and uses of each of these.