import { IMeasure } from '../types';
export type energySystems = 'metric' | 'imperial';
export type energyUnits = 'J' | 'kJ' | 'mWh' | 'Wh' | 'kWh' | 'MWh' | 'GWh' | 'Btu-it';
export declare const energy: IMeasure<energySystems, energyUnits>;