Electric vehicles come with some obvious perks, from impressive acceleration and near-silent driving to charging costs that are typically, though not always, lower than fueling up with gas. But ...

Over the years, Tesla has accustomed us to being rather silent about technical details related to its batteries. Even the battery capacity of particular EV models isn't shown on the company's website.

Batteries lose capacity over time. The process can be slowed down, but it’s inevitable, so after a few years, your EV won’t provide quite as much range as when it was new. The battery will lose about ...