I'm becoming more optimistic about EV battery longevity. Research shows batteries rarely fail, and most of what I've seen has convinced me that battery degradation is not a major concern over the typical lifespan of a vehicle. But Out Of Spec's testing on this 250,000-mile Tesla Model S is tempering my expectations. First, we saw that the car doesn't go nearly as far as it once did. Now, we're seeing that it takes much longer to charge, too.
