This work studies the feasibility of using electric batteries in commercial aircraft with the intention of reducing or eliminating the CO2 emissions produced by combustion engines. To achieve this, the functioning of different propulsion systems with electric batteries is explained, followed by the operation and characteristics of different compositions of electric batteries, current and theoretical. The study is based on the characteristics of the batteries and analyses for a number of aircraft and routes, whether it is feasible, in terms of power and weight, to exchange the current fuel for an electric battery. At the end of the study, the advantages and disadvantages of the implementation of electric batteries are listed and it is concluded that although it is possible from a weight point of view, from an economic one, it would not be profitable for airlines with current technologies.