UK-based air taxi maker Vertical Aerospace Ltd (NYSE:EVTL) has struck a deal with the maker of what it says are the world's highest-power battery cells to work towards mass production of its VX4 electric vertical takeoff and landing (eVTOL) aircraft. The UK company, which is listed in New York, said E-One Moli Energy Corp, better known as Molicel, will supply high power cylindrical cells for the VX4 under a new strategic partnership.