For comparison, Tesla warns that it does not cover battery degradation from “battery usage” under its warranty:
“The Battery, like all lithium-ion batteries, will experience gradual energy or power loss with time and use. Loss of Battery energy or power over time or due to or resulting from Battery usage, is NOT covered under this Battery Limited Warranty. See your owner documentation for important information on how to maximize the life and capacity of the Battery.”
Of course, it covers any defect on the battery, including if the defect results in abnormal capacity losses, but it doesn’t really define a normal capacity loss. Early
data shows a trend of reaching 150,000 miles before coming close to a 10% capacity loss, which is the minimum loss expected by GM under its warranty. Tesla’s battery and drivetrain warranty is for 8-year and with unlimited mileage.