Ford Says 2021 Mach-E Batteries Keep 92 Percent of Capacity After Five Years

Ford says 2021 Mustang Mach-E batteries keep 92 percent of capacity after five years, according to company data reported on November 9. The Mach-E was Ford first volume electric vehicle, launched in late 2020 as a 2021 model, so the five-year figure is one of the longest real-world battery health readings available for a mainstream American EV.

The number matters because battery degradation is the biggest fear hanging over used EV buyers. A car that has lost only 8 percent of its capacity after five years should still deliver nearly all of its original range, and it undercuts the worry that an out-of-warranty EV will soon need a ruinously expensive battery replacement. For owners, it is evidence that the battery will likely outlast the car. For the used market, it supports residual values for early Mach-E models.

The timing is notable. Ford EV sales fell 80.2 percent in Q3 2026 to 6,047 vehicles, and the Mach-E no longer functions as a strong Model Y rival in new-car sales. But the installed base keeps proving durable, and durability is exactly what a buyer of a five-year-old electric SUV wants to hear. The 92 percent figure is a company-reported number, not an independent test, so it should be read as Ford data rather than a verified fleet average.