Toyota concept vehicles (2000–2009) Fine-S and was shown at the October 2003 Tokyo Motor Show and the January 2004 North American International Auto Show. The Fine-N uses a hydrogen fuel cell electric hybrid system which drives four independent 25 kW electric motors - one in each wheel. The hybrid system uses a Lithium-ion battery under the seats. Control is by drive-by-wire. The Alessandro Volta is a concept car developed in the collaboration of the Japanese manufacturer Toyota and the Italian design company Italdesign Giugiaro. The concept vehicle named after Alessandro Volta, the Italian physicist who invented the battery (and the namesake of the volt
Electric potential one can therefore write where "V" is the scalar potential defined by the conservative field F. The electrostatic potential is simply the special case of this definition where A is time-invariant. On the other hand, for time-varying fields, unlike electrostatics. The SI derived unit of electric potential is the volt (in honor of Alessandro Volta), which is why a difference in electric potential between two points is known as voltage. Older units are rarely used today. Variants of the centimeter gram second system of units included a number of different units for electric potential, including the abvolt and the statvolt.