The table below lists the warranty duration and mileage for the leading EV brands in the UK. Fisker and Lexus offer the best EV battery warranties among the brands listed. Both Fisker and Lexus provide a 10-year or 100,000-mile warranty, which is longer than the 8-year duration offered by most other brands. However, it's. An electric car battery warranty will normally cover the replacement or repair of the battery if it experiences issues during the warranty. In the UK, electric car battery warranties typically fall into two main categories, each with its own coverage scope and duration. Here are the two types of. You can usually get an additional extended warranty from your EV manufacturer that will extend the length of the standard electric car. When comparing electric car battery warranties, there are a number of points to look at in order to find the best warranty for your needs: 1. What areas it covers Assess what aspects of.