ENERGY DENSITY

"Characteristic parameter of a battery or a capacitor indicating the amount of electrical energy stored per unit weight or volume. The terminology is not strictly defined. Weight based energy density is often called ""specific energy"" or ""gravimetric energy density."" Volume based energy density is often called ""energy density"" or ""volumetric energy density."" The energy density is typically expressed as watt-hour/kilogram or watt-hour/liter. "