Heading
Calendar aging is the built-in, baseline degradation that a lithium ion battery will experience with time. You can't stop it, but you can accelerate it with poor battery hygiene such as overcharging, leaving the battery with high states of charge in high heat, or running the battery down to 0%.
As people get older, things naturally get a little slower. No matter how well you sleep, eat, and exercise - time comes for us all. The same is true for lithium ion batteries. Calendar aging is the term that describes the slow, inevitable loss of capacity and power. It starts as soon as the battery is made, and it follows the "s-curve." That means slightly faster degradation at first, followed by a long steady decline, and then a rapid fall of to "end of life."
While you can't stop calendar aging, it shouldn't scare you off from an EV. Expect the long, slow decline phase to last up to 20 years.
