https://www.theverge.com/2017/12/5/16704060/london-zero-emission-electric-taxi-lecv

Quote:
With a 50kW rapid charge, the battery powers up to 80 percent in 25 minutes. The TX also has the option for a range extender 1.5-liter petrol engine for use when the driver wants to conserve the battery. It has three different modes — Smart, Pure EV, and Save that adjust the usage of battery and gasoline power. LEVC’s taxi allows for a range of over 650 km, including over 120 km using battery power.
