Material:

By Mass:

By Volume:

Cost $ per Wh

More:

Liquid H2

39,000 Wh/kg

2,600 Wh/l

Propane

13,900 Wh/kg

6,600 Wh/l

Butane

13,600 Wh/kg

7,800 Wh/l

Heating Oil

12,800 Wh/kg

10,400 Wh/l

Diesel Fuel

12,700 Wh/kg

10,700 Wh/l

Gasoline

12,200 Wh/kg

9,700 Wh/l

See note (1)

LNG (-160°C)

12,100 Wh/kg

7,216 Wh/l

Ethanol

7,850 Wh/kg

6,100 Wh/l

Methanol

6,400 Wh/kg

4,600 Wh/l

Maryland/KAIST

3,000 Wh/kg

Lithium Thionyl Chloride Battery

700 Wh/kg

1,100 Wh/l

$1.16

See note (2)

EESU Capacitor

682 Wh/kg

1,513 Wh/l

EEStor

Solid Polymer Electrolyte Battery

300 Wh/kg

Seeo

Li-Ion Battery

150 Wh/kg

200 Wh/l

$4.27

Li-Polymer Battery

130-200 Wh/kg

300 Wh/l

Alkaline long-life Battery

110 Wh/kg

320 Wh/kg

$0.19

NiMH Battery

100 Wh/kg

280 Wh/l

$0.99

NiCad

39 Wh/kg

140 Wh/kg

$1.50

Carbon-Zinc Battery

36 Wh/kg

92 Wh/kg

$0.31

Lead-Acid Battery

25 Wh/kg

40 Wh/l

$0.17