Tesla owners get 'no-fault' battery warranty

Tesla Motors says that if the battery pack fails in your Model S electric sedan for any reason except deliberate abuse, you can have a replacement, free, for eight years.

That warranty length matches mainstream automaker's pledges about their electric-car batteries. But Tesla goes a bit further.

The Model S' bigger 85 kwh battery pack is warranted for eight years or unlimited mileage. The smaller, 60 kilowatt-hour pack, is eight years or 125,000 miles, whichever comes first. The usual is eight years/100,000 miles.

"We don't think anybody could put enough miles on to kill the (85 kwh) pack. That could turn out to be wrong, but we have half-a-million miles on one in the lab," says Tesla chief Elon Musk. "Even the 60 kwh customers will be able to take it well over 200,000 miles."

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