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The table displays 4 rows and 4 columns. The table information is as follows:

- Feature, energy density W prime in watt-hour per kilogram. Traditional capacitor, tilde 10 to the power of negative 2. Super capacitor, 1 to 10. Battery, 5 to 150.

- Feature, power density P prime watt per kilogram. Traditional capacitor, 1000 to 10000. Super capacitor, 1000 to 5000. Battery, 10 to 500.

- Feature, charge and discharge rate T. Traditional capacitor, 10 to the power of negative 3 seconds. Super capacitor, tilde 1 second to 1 minute. Battery, tilde 1 to 5 hours.

- Feature, cycle life N sub c. Traditional capacitor, infinity. Super capacitor, tilde 10 to the 6th power. Battery, tilde 10 cubed.

In the graph, the x axis displays power density P prime in watt per kilogram from 10 to 10000 and the y axis displays an energy density W prime in watt hour per kilogram. Fuel cells are in the range of power density 20 to 80 at the energy density of 500. Batteries are in the range of 20 to 700 at energy density of 20. Supercapacitors are in the range of 1000 to 8000 at the energy density of 5. Traditional capacitors are in the range of 4000 to 9000 at the energy density of 0.03. Batteries and supercapacitors are labeled future developments. All values are estimated.