Ford says the batteries in its first-year Mustang Mach-E electric SUVs have kept 92% of their usable capacity on average, after an average ownership period of 5.2 years. The data Ford published on November 9, 2026 covers more than 36,000 vehicles from the 2021 model year.
Key points
- Ford reports an average battery state of health of 92% for more than 36,000 Mustang Mach-E SUVs from the 2021 model year.
- According to Ford, 95% of those vehicles fall between 87% and 97% battery health.
- More than 2,000 owners have passed 100,000 miles and average better than 91% health, Ford says.
- More than 30 owners have passed 200,000 miles and average 88% health, according to the company.
- The data is as of August 2026 and comes from Ford’s connected-vehicle fleet in the U.S. and Canada.
What Ford’s battery data shows
Ford calls the Mustang Mach-E its first mass-produced modern electric vehicle. The company says the class of 2021 has driven 2 billion all-electric miles across all 50 states and Canada, with an average ownership period of 5.2 years. According to InsideEVs, the cars in the study had covered 55,000 miles on average.
| Group of 2021 Mach-E vehicles | Average battery health, per Ford |
|---|---|
| All vehicles (more than 36,000) | 92% |
| More than 100,000 miles (2,000+ vehicles) | Better than 91% |
| More than 200,000 miles (30+ vehicles) | 88% |
Source: Ford, November 9, 2026.
Battery health here means usable capacity compared with a new pack. Ford says the figures come from its connected-vehicle fleet data, processed in aggregated and anonymized form, and are reported at the fleet level. Kevin Vander Laan, Ford’s technical leader for high-voltage battery cells and systems, points to the 87% to 97% spread, writing that “averages can hide variation, so that range matters.”
All 2021 Mach-E vehicles use NCM (nickel-cobalt-manganese) battery cells. Ford’s newer EV batteries use LFP (lithium iron phosphate) chemistry, which the company says benefits from an occasional charge to 100% to keep the battery management system calibrated.
How Ford says owners can protect battery health
Ford’s guidance for owners is to charge mostly on Level 2 at home and use DC fast charging when needed, to precondition the car while it is plugged in, to park in shade in summer when possible, and to follow the charge-level settings in the Ford app. Across the battery-electric lineup it has released in the U.S. and Canada over the past five years, Ford says, citing a 2026 field data study, its packs are designed to last at least 10 years and average above 90% health at 100,000 miles.
Why it matters
Battery degradation is one of the top concerns of car buyers, InsideEVs notes. In theory, InsideEVs estimates, a top-trim 2021 Mach-E with 305 miles of EPA range would now be rated for about 280 miles.
Other perspectives
- InsideEVs, which attributes the figures to Ford, cautions that they are only averages, that EVs in the hot American Southwest tend to age faster, and that all cars in the study have NCM packs (InsideEVs).
- Electrek also reports the results as Ford’s own fleet data; it cites no independent figures.
Sources
- Five Years In, Mustang Mach-E Battery Data Shows What Real-World Electric Vehicle Durability Looks Like — Ford Motor Company, November 9, 2026
- Ford Tested 36,000 Mustang Mach-E Batteries. Here’s How They Held Up After 100,000 Miles — InsideEVs, November 9, 2026
- Ford’s EV batteries retain more than 90% health after 100,000 miles — Electrek, November 9, 2026
