Milano Taxi Concept, with its top speed of 120 km/h is driven by an electric motor with a peak power of 85 kW (continuous power: 50 kW). The motor is supplied with energy via a lithium-ion battery integrated in the concept car's underbody. Thanks to the implemented battery storage capacity of 45 Kilowatt-hours (kWh) and the relatively low vehicle weight (1,500 kilograms), despite the battery, it is possible to cover distances of up to 300 kilometres (per NEDC) depending on driving style. The storage battery can readily be recharged to up to 80 percent of its total capacity in just over one hour, the exact time depending on the available recharging infrastructure and battery's momentary charge state."
So after every 4 hours of use or so the car will need to be charged for over an hour? Sounds like that will be effective.
Then again, if Italian taxi drivers are as industrious as the rest of the country has a reputation for... maybe this will work fine.