When buying a used EV, it is impossible to know the true condition of the battery — leaving buyers exposed to significant risk if the battery is degraded or approaching the end of its useful life.
Battery condition uncertainty is a reasonable concern for used EV buyers, particularly those without access to professional inspection resources. Unlike a gasoline engine, which can be assessed through a mechanical inspection and service history review, a battery pack's internal condition is not visible to the naked eye.
However, the tools to address this are increasingly available. Most automakers' dealership networks can perform battery health diagnostics reporting remaining capacity as a percentage of the original. Third-party services like Geotab and Recurrent Auto provide battery health history reports for many popular EV models. Many manufacturers' battery warranties — typically 8 years or 160,000 km, guaranteeing at minimum 70–80% capacity retention — transfer with the vehicle to subsequent owners, providing meaningful protection.
Real-world data from over 22,700 EVs tracked by Geotab shows average annual degradation of just 2.3%, meaning a five-year-old vehicle would be expected to retain approximately 88% of its original range. Armed with a battery health report and an understanding of typical degradation rates, used EV buyers can make well-informed decisions.