On 27 September 2017, EasyJet announced its partnership with an American start-up company Wright Electric with the purpose of developing and introducing a short-haul 120-seat all-electric airline. The propulsion system is said to comprise a series of eight electrically driven ducted fans that are buried in the wings, which are powered by numerous battery packs distributed underneath the cabin floor; it is claimed to possess a range of roughly 335 miles, suitable for about one-fifth of EasyJet's current city routes, and facilitate zero-emission flights, as well as being 50% quieter and 10% less expensive to operate than conventional jet airliners. At the time, EasyJet stated that it intended to introduce the electric aircraft into revenue service within 10 years. In October 2018, EasyJet stated that progress was being made on its electric ambitions, and that the partnerships planned to test a nine-seater electric plane as early as 2019.