Ford says 2021 Mustang Mach-E batteries average 92% health after five years in US and Canada
Ford's connected-vehicle data covers about 36,000 first-model-year Mach-Es sold to retail and fleet customers, with 95% of them between 87% and 97% usable battery capacity. UK and European vehicles are not included.
Ford has published battery state-of-health data for its first model year of Mustang Mach-E. It says model-year 2021 vehicles in the US and Canada have retained 92% of their usable battery capacity on average, after an average of 5.2 years of ownership.
The figures come from Ford's own connected-vehicle fleet data, which it says was processed through its standard aggregated and anonymised vehicle data processes. According to Ford, the dataset covers all model-year 2021 Mach-Es sold to US and Canadian retail and fleet customers, about 36,000 owners, as of August 2026. Retail and fleet vehicles are combined rather than reported separately. Ford puts the cohort's total at two billion all-electric miles and says 95% of the vehicles sit between 87% and 97% battery health.
Ford says more than 2,000 owners in the cohort have passed 100,000 miles on the original battery and average better than 91% battery health. A much smaller group of just over 30 drivers past 200,000 miles averages 88%, according to Ford.
The 2021 Mach-Es in the dataset use NCM battery chemistry. Ford says some newer Ford EV batteries use LFP chemistry, which benefits from an occasional charge to 100% to keep the battery management system calibrated.
Across its full battery-electric line-up released in the US and Canada over the last five years, Ford says its packs are designed to last at least 10 years and are maintaining, on average, more than 90% health at 100,000 miles. It bases that figure on a 2026 manufacturer field data study.
Ford advises using home AC charging, which it calls Level 2 in North American terms, for daily driving and saving DC rapid charging for when it is needed. It describes charging behaviour as one of the factors that can influence battery health over time.
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