To improve the encoding compressibility of prediction residuals. A mechanical power service switch is provided for selectively communicating the mechanical power service between a first mechanical power service communicating device, such as a host or other mechanical power service source and a first mechanical power service communicating device, such as a mechanical power service consumer. The invention also relates to spin-coatable compositions of compounds of structure dissolved into a solvent. The controller is configured to control the current converter to charge the battery with the first current when the determination unit determines the external device is not a dedicated power supply, and to control the current converter to charge the battery with the second current when the determination unit determines the external device is a dedicated power supply. The resilient member has a Shore A hardness of between about 20 and about 50. A counter is maintained of updates made to each statistic that has been automatically generated.