The remaining battery capacity computation system has a remaining capacity computation apparatus, which is connected to an electrical equipment unit via a one line communication circuit. A second sensor provides an input as to whether the biometric input is from a living person, through the sensing of a life-indicative parameter such as an appropriate level of blood oxygen in the sensed item, and the sensors are covered by a removal cover which provides electrostatic discharge when the cover is opened. This new and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.