Dr. Klaus Radermacher, an expert in transportation systems, shares his unique perspective on energy comparisons within the aviation sector. The article delves into the efficiency and energy requirements of aviation, highlighting the crucial role of Jet A-1 fuel in powering long-distance flights. Radermacher discusses the challenges of transitioning to sustainable electric power for aircraft, noting the current limitations of battery technology in terms of weight and power output. While advancements have been made in battery performance, the article emphasizes the considerable weight disparity between batteries and jet fuel, particularly evident during high-power consumption phases like takeoff. Despite efforts to improve battery efficiency, large-scale adoption of electric power for long-distance commercial flights remains a distant goal. However, niche markets such as short-distance flights show potential for quicker implementation of sustainable electric power solutions. The article underscores the need for further innovation in energy storage and highlights the intricate balance between energy density and power output in battery technology for aviation.