This video states the specific energy of batteries is only ten times less than fossil fuels. In a direct comparison it's fifty to one-hundred times less.
There are other advantages because of the greater efficiency of electric motors and the motors weigh less, however that is not mentioned.
quotingSome people say EVs are the future, however it's currently a huge step backward with the use of battery technology.
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Specific energy (MJ/kg):
46 Gasoline
25 Coal
16 Firewood
0.936 Battery
Sources:
https://batteryuniversity.com/article/bu-216-summary-table-of-lithium-based-batteries
https://world-nuclear.org/information-library/facts-and-figures/heat-values-of-various-fuels.aspx