The amount of energy a cell can contain. The energy density is referred to the ratio of cell energy to weight or volume.

is the amount of energy stored in a given system or region of space per unit volume, and is most commonly denoted u. It therefore has units of energy per length cubed.

The amount of energy a cell can contain. Gravimetric energy is the Watt-hours a battery is capable of providing per given weight (pound or Kg); and volumetric energy is the Watt-hours per given size (cubic inch or cubic centimeter). The energy is defined as nominal battery voltage multiplied by rated capacity.

Ratio of battery energy to weight or volume (watt-hours per kilogram or watt-hours per cubic centimeter).

The electromagnetic energy contained in an infinitesimal volume divided by that volume.

The energy output from a battery per unit volume, expressed in Wh dm–3.

The ratio of cell or battery energy to either the weight (Wh/lb or Wh/kg) or the volume (Wh/L or Wh/cu.in.).

Amount of potential energy in a given measurement of fuel. See Gravimetric Energy Density and Volumetric Energy Density.

The calories contained in 100 grams of a particular food defines that food's energy density.

Electromagnetic energy in a given volume of space divided by the volume. The units are joules per cubic meter (J/m3).

The ratio of the energy available from a cell or battery to its volume (Wh./L). Also used on a weight basis (Wh/kg).

Characteristic of a cell. It is basically a measurement of how much CAPACITY you get for each unit weight. Since the cells are usually a high percentage of our total weight the higher this is the better. If you could get a 2000 mAH cell that weighs only half the conventional ones you would save a lot of weigh from the plane.

The amount of energy stored in a unit of weight or volume, expressed in watt hours per kilogram or watt hours per liter.

The ratio of available energy per pound; usually used to compare storage batteries.

the amount of energy stored in a specific volume or weight.

The ratio of energy available from a battery to its volume (Wh/1) or mass (Wh/kg). "watts to weight" ratio.

Ratio of cell energy to weight or volume (watt-hours per pound, or watt-hours per cubic inch).

The amount of energy that can be contained in a specific quantity of the fuel source. Typically quoted in watt-hours per pound, wh/lb, or watt-hours per kilogram, wh/kg. For example, flooded lead-acid batteries generally have about 25 wh/kg, the latest advanced lead-acid designs claim about 50 wh/kg, and newer battery technologies such as NiMH and LiON are in the 80-135 wh/kg range.

A battery’s rated energy per unit of volume. Measured in units of watt-hours per liter (Wh/l).

The ratio of the energy available from a cell/battery to its volume (Wh/L) or weight (Wh/kg). Mainly used for rechargeable batteries.

The ratio of the energy available from a battery to its volume. The total energy stored in a capacitor is usually quoted in Joules. Traditional capacitors may store a few Joules while supercapacitors store hundreds or thousands of Joules depending on their size.

a weight-loss approach that works by focusing choices on foods that provide a good volume-for-calories ratio; low energy density foods are usually rich in water and fiber and low in fat.

n. figure of merit usually expressed in Joules per cubic inch for capacitors

The stored energy in a battery or a cell. It is related either to mass (gravimetrical energy density in watt hours per gram) or to volume (volumetric energy density in watt hours per cubic centimeter).

These two terms are often used interchangeably. Energy density refers mainly to the ratio of a battery's available energy to its volume (watt hour/liter).Specific energy refers to the ratio of energy to mass (watt hour/kg). The energy is determined by the charge that can be stored and the cell voltage (E=qV).

The ratio of the total energy available from a battery divided its physical volume (joules per cubic meter) or its weight (joules per kilogram.)

Term used to measure the output energy for Lasers and Pulsed Light Sources. Quoted in J/cm2 (Joules per square centimetre). See Fluence.

Energy density is the amount of energy stored in a given system or region of space per unit volume or per unit mass, depending on the context. In some cases it is obvious from context which quantity is most useful: for example, in rocketry, energy per unit mass is the most important parameter, but when studying pressurized gas or magnetohydrodynamics the energy per unit volume is more appropriate. In a few applications (comparing, for example, the effectiveness of hydrogen fuel to gasoline) both figures are appropriate and should be called out explicitly (hydrogen has a higher energy density per unit mass than does gasoline, but a much lower energy density per unit volume in most applications).