The Lotus Ethos is a fully plug-in hybrid concept car that was unveiled at the 2010 Paris Motor Show as the "Lotus CityCar". The vehicle was developed by Lotus Engineering, a separate division from Lotus Cars. The CityCar has a lithium battery pack with an all-electric range of 60 kilometres (37 mi), and after the battery is depleted the 1.2-liter petrol engine kicks in to help with charging, allowing the car to run more than 500 kilometres (310 mi). The concept car is designed for flex-fuel operation on ethanol, or methanol as well as regular petrol.