Key Takeaways
- Electric vehicles have two batteries: a small 12V battery and a large lithium-ion battery that powers the driveline. Checking the health of the larger battery is important when buying a used EV.
- Battery health determines the energy storage capacity of an EV and affects its range. Over time, all battery types degrade and lose capacity, resulting in decreased range. However, on average, an EV battery should last longer than you own the vehicle.
- There are various ways to check EV battery health, such as observing the estimated range on the dashboard, monitoring the state of charge, checking for engine or battery alerts, using diagnostic tools or apps, or visiting a dealer service center. Specific methods vary by manufacturer.