Ford Says Mach-E Batteries Retained 92% Capacity on Average

Ford says an analysis of about 36,000 2021 Mustang Mach-E electric SUVs found that their batteries retained an average of 92% of usable capacity after an average ownership period of 5.2 years. The vehicles were sold to customers in the United States and Canada, and the data was current through August 2026.

The automaker reported that 95% of the vehicles had battery health between 87% and 97%. More than 2,000 had traveled over 100,000 miles, averaging better than 91% battery health, while more than 30 with over 200,000 miles averaged about 88%.

Ford said the cohort had accumulated more than 2 billion electric miles. The results come from the 2021 model-year vehicles, which have been in customer use for about five years. A separate Ford analysis of its full battery-electric lineup found average battery health above 90% at 100,000 miles, the company said.

The findings are based on Ford’s own vehicle data. The company has not provided an independent audit or the underlying vehicle-level records in the material describing the results. That means the reported averages offer a manufacturer’s account of battery performance, rather than an independently verified measurement of the full cohort.