An electric car is nothing without its battery, and this is one area that demands special attention. A battery not only ages over time. Charging cycles, maintenance and other charging-related activities also influence its condition. As the capacity of the battery decreases, so does the range of the vehicle.
An ADAC endurance test (German source) of the Nissan Leaf found that the original range dropped by around 11 percent after 80,000 kilometres. In most cases, however, the range remains sufficient for everyday journeys.
Some manufacturers provide buyers with a battery certificate. Mercedes-Benz’ battery certificate, for example, guarantees the performance of the battery in fully electric vehicles and can be requested when purchasing a vehicle second-hand. Other manufacturers also provide similar certificates with their vehicles.
You can view the current battery status in terms of the state of charge (SOC) on the vehicle display. This will show you when you need to take a charging break while driving.