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gear – n. a set of wheels that work together to affect the relation between the speed of a moving vehicle and the speed driven parts
battery – n. a device that is placed inside a machine to supply it with electricity
efficiency – n. the ability to do something or produce something without wasting materials, time, or energy
range – n. the distance within which something can be reached
gasoline – n. a liquid fuel used to power motor vehicles
emission – n. the act of producing or sending out something (such as energy or gas); something sent out or given off
source – n. a place or thing from which something comes
brand – n. a model or kind of product
