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How long do Tesla batteries REALLY last? Model S tested after 250,000 kilometres

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A Model S has had its batteries tested after 250,000kms
Andrew Chesterton
Contributing Journalist
25 Mar 2020
2 min read

One of the biggest mental hurdles to overcome when buying an electric car is the shelf-life of the battery. The battery - and the range they deliver - make up one of the most important buying decisions, and you don't want to be left wondering what will happen if that range starts to plummet.

After all, a promised driving range counts for naught if your EV can only manage it for the first two years. 

The brands do their best to reduce those fears, of course. Tesla, for example, guarantees its batteries for eight years or 240,000kms, whichever comes first, on the Model S and Model X, with the brand promising 70 per cent battery capacity retention over that period.

And if a recent test by Tesla Model S 70D owner, Branden Flasch, is anything to go by, that's exactly what you'll get. If not better.

Branden's vehicle had reportedly travelled 234,964kms when he put it to the test - or just under the 240,000km ceiling - and the results of his test were very impressive.

The Model S in question was purchased in 2015, and its owner charged it to 99 per cent before the test, and then driving it until the batteries are completely depleted, measuring its kWh usage to check the battery's depletion. The reported results have the Model S using 58.5kWh, roughly 83 per cent of their original 70kWh capacity.

Now, it's worth pointing out that this is one well-driven Tesla. The average Australian drives around 13,000km per year. This Model S travelled more than three times that distance, at 46,800km per year over five years. 

Andrew Chesterton
Contributing Journalist
Andrew Chesterton should probably hate cars. From his hail-damaged Camira that looked like it had spent a hard life parked at the end of Tiger Woods' personal driving range, to the Nissan Pulsar Reebok that shook like it was possessed by a particularly mean-spirited demon every time he dared push past 40km/h, his personal car history isn't exactly littered with gold. But that seemingly endless procession of rust-savaged hate machines taught him something even more important; that cars are more than a collection of nuts, bolts and petrol. They're your ticket to freedom, a way to unlock incredible experiences, rolling invitations to incredible adventures. They have soul. And so, somehow, the car bug still bit. And it bit hard. When "Chesto" started his journalism career with News Ltd's Sunday and Daily Telegraph newspapers, he covered just about everything, from business to real estate, courts to crime, before settling into state political reporting at NSW Parliament House. But the automotive world's siren song soon sounded again, and he begged anyone who would listen for the opportunity to write about cars. Eventually they listened, and his career since has seen him filing car news, reviews and features for TopGear, Wheels, Motor and, of course, CarsGuide, as well as many, many others. More than a decade later, and the car bug is yet to relinquish its toothy grip. And if you ask Chesto, he thinks it never will.
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