eVTOL Battery Tech; Finding The Right Energy Density eVTOL companies are racing to get to market first with a commercially ready and available passenger-carrying aircraft. Many of them are at different stages in the developmental curve. Some are much closer to FAA and EASA certification. However, there is one facet of the development of eVTOLs that is probably the most important component, battery tech! Specifically Lithium-ion battery tech is a touchy subject for many. It works wonders for current applications in everyday small items and even in electric cars. The issue with lithium-ion batteries is that it does not reach the required energy density that is ideal for the eVTOL industry.