Owners can also make use of an associated smartphone app, which allows the climate control, lights and locks to be activated remotely, and gives information on journey times and the car's location.
The Mii Electric shares its drivetrain with the recently revealed Skoda Citigo-e iV and replaces the petrol-engined Mii, which went out of production in July.
With an 82bhp electric motor mated to a single-speed transmission, the Mii Electric produces 156lb ft torque, enabling it to accelerate from 0-31mph in 3.9sec and on to a limited top speed of 81mph.
A 36.8kWh battery pack gives a WLTP-certified range of 162 miles. That's two miles fewer than the 164 offered by the Citigo-e iV but 79 more than the ageing Volkswagen e-Up.
Styling changes over the outgoing Mii are subtle, limited to 16in alloy wheels and the addition of illuminated badging to the back and sides. Unlike the Citigo-e iV, the Mii retains the mesh grille fitted to the petrol car.
Inside, the Mii Electric sports a redesigned dashboard, heated, 'performance-inspired' seats and a leather steering wheel, handbrake and gear selector. Boot space is unchanged, at 251 litres.
The Mii Electric is aimed squarely at “those who spend the majority of their time traversing metropolitan and suburban streets”, says Seat. It can be charged in around four hours to 80% capacity from a 7.2kW home wallbox or one hour from a 40kW public fast charger.
Seat said the Mii’s shift to electric power will help prepare its dealerships for the arrival of the El-Born in 2020.
Company president Luca de Meo said: “In Europe, the electric vehicle market grew by 46% in the first four months of the year. Moving forward, we expect electrified vehicles to play an important role within our range.
“The Mii Electric is the start of that journey and at the same time brings to the market an affordable electric car.”