Energy Density

Characteristic parameter of a battery/electrical power source indicating the amount of electrical energy stored per unit weight or volume.

Specific Energy or Gravimetric Energy Density

Weight based energy density [watt-hour/kg].

Volumetric Energy Density

Volume based energy density [watt-hour/litre or watt-hour/m³].

Note: the terminology is not strictly defined.

See also: Battery, Power Density, Watt Hours per Kilogram.