It is all about energy and weight.
A jet turbine has an Efficiency of 90%.
So from 1 kg of fuel (kerosin) it gets 9 kWh of energy to propel the aircraft.
The same amount of energy taken from a battery needs at last 60kg of akku.
On a flight to europe 26 tons of kerosin are needed.
A LiIo battery to store the amount of energy would weight 1.560 Tons.
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