Capacitor type Capacity Volts Temp. Energy-to-weight ratio Power-to-weight ratio
ACT Premlis Lithium ion capacitor[62] 2000 F 4.0 V 25 °C 54 kJ/kg to 2.0 V 44.4 W/kg @ 5 A
31 kJ/kg to 2.0 V 850 W/kg @ 10 A
Nesccap Electric double-layer capacitor[63] 5000 F 2.7 V 25 °C 19.58 kJ/kg to 1.35 V 5.44 W/kg C/1 (1.875 A)
5.2 kJ/kg to 1.35 V 5,200 W/kg[64] @ 2,547A
EEStor EESU barium titanate supercapacitor[65] 30.693 F 3500 V 85 °C 1471.98 kJ/kg 80.35 W/kg C/5
1471.98 kJ/kg 8,035 W∕kg 20 C
General Atomics 3330CMX2205 High Voltage Capacitor[66] 20.5 mF 3300 V  ? °C 2.3 kJ/kg 6.8 MW/kg @ 100 kA