This is about 0.5 MJ/kg compared to fuel which is closer to 50 MJ/kg ( or closer to 10 when normalizing to efficiency). ie this is why ev batteries need 20x the weight of gasoline at least to store similar amounts of on board energy.
EVs don't need to store the same amount of energy as an ICE car though. Just enough to get as far would be more than enough energy. Twice the motor efficiency and the fact that ICE's don't regenerate fuel when breaking helps even it a bit.
Yet modern EV cars and ICE cars have similar range autonomy without carrying batteries worth 20x the weight of gasoline, due to the abyssal efficiency of combustion engines which produce mostly heat.
It is pretty close to a 20x difference, but they make up most of that on the lack of gas tank and engine, and lower range. (EV’s tended to weigh 600lbs more the last time I checked).
Someone should build an EV that shreds the empty batteries and ejects them into the face of passing schoolchildren to lighten the load and better recreate the health and environmental impacts of ICE vehicles.
except fuels burns only once and can't be recharged