Accumulator capacity loss during operation is one of the factors for which electric vehicles often come under criticism. However, this process is natural for any lithium ion battery devices – for example, many of us have noticed that after several years of intensive use a smartphone starts losing its charge faster than during first days after the purchase. But an independent research of Plug-in America shows that Tesla Model S battery loses less than 8% of its potential even after 150,000 km mileage – see detailed results of the research further.

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The research includes data of 500 Tesla Model S electric vehicles with cumulative mileage of nearly 20 million km. The average wear of the battery is approximately 5% during the first 80,000 kilometers. In addition, they also studied Tesla vehicles with higher mileage – over 150,000 km. The maximum level of battery wear is below 8%. The Plug-in America research results for various modifications of Model S can be found in the chart:

Courtesy of Plug In America

In addition, the study showed that since 2012 the number of technical inquiries to Tesla Motors service stations with battery, electric motor, or charger problems had substantially decreased.

Courtesy of Plug In America

Today Tesla Motors provides an 8-year guarantee for the battery and power train. In addition, according to Elon Musk, the company tested the Model S battery with laboratory tests – they simulated around 800,000 km mileage. After completion such a serious test the battery retained over 80% of its capacity.