A warewashing detergent composition is provided according to the invention. The audio decoder section receives the audio control signal and generates a tone as an audio output in accordance with the audio control signal. The compounds are suitable, for example, for use as anorectics. The method of preparing a positive active material for a rechargeable lithium battery includes the steps of dissolving a metal compound in alcohol to prepare a metal compound solution in a sol state, coating LiCoO2 with the metal compound solution in the sol state and sintering the coated LiCoO2 at 150 to 500 C. Some of the discs have channels inside them which are conductively connected to the inside of their hollow shaft.