As an example: My vehicles electric battery is warrantied for 10 years or 150,000 mi. Even with that being said, I have seen models of my car used well into the 300-400,000 mi range.

And while I'm not an expert on the matter, it is my understanding that there are recycling plants for electric vehicle batteries. Which I would imagine would reduce the environmental cost of electric vehicles.

Not to mention the research being done on different battery chemistries that are less environmentally hazardous, last longer, are more energy dense, and so on.