If in any doubt...
Fuel / Energy by mass (Wh/kg)
Hydrogen (350 bar) / 39,300
Gasoline, diesel, natural gas (250 bar) / 12,000–13,000
Body fat / 10,500
Black coal (solid), Methanol / 6,000–7,000
Wood (average) / 2,300
Lithium-ion battery / 100–250
Lead acid battery / 40
Compressed air / 34
Supercapacitor / 5
Table 2: Energy densities of fossil fuel and batteries.
Source:
https://batteryuniversity.com/learn/..._an_ev_battery