new study from Plug In America
predicts great things for Tesla Roadster battery life—at 100,000 miles, the pack should retain 80 to 85 percent of its original capacity.
The study is based on a survey of 126 Roadster owners, whose cars have collectively covered more than three million miles. It shows that owners of the cars are driving them an average of 16,000 miles per year (compared to 13,500 for the average conventional cars). So, on average, they're not garage queens.
Tesla itself said in a 2006 blog post that its Roadster packs would last for more than five years and be capable of covering 100,000 miles, with some decline in performance. The company estimated that a car that covered 50,000 miles over five years would have 70 percent capacity left.
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