Scientists working on a new battery for Tesla have released the latest results of their research. They created a lithium-ion battery that can withstand 15,000 discharging cycles, equivalent to 3.5 million kilometers of electric vehicle mileage. That is, it will last approximately 40 years and will last longer than the electric car itself. These results have impressed the developers so much that they ask, do they even need such good batteries?

Jeff Dan and his lab have been working for a year on behalf of Tesla on a durable battery for electric cars. Scientists recently reported test results that suggest the new lithium-ion battery will be able to last for 15,000 charge/discharge cycles. That is, it will be enough for more than 3.5 million km for an electric car with an average power reserve, writes Electrek.

Dan also showed the results of different depths of discharge – up to what percentage of capacity the researchers discharge the battery before recharging it. It looks like the new lithium-ion batteries are doing great after 15,000 cycles. Moreover, as numerous tests have shown, if a new battery runs in a discharge mode within 25-50% and then recharges again, it will hardly degrade.

This means that if such a battery appears in a Tesla car and has a nominal power reserve of 480 kilometers, driving on average 50 kilometers a day – that’s how much 90 percent of Americans drive and then recharges again – it won’t degrade. Such battery will last longer than the electric car itself.

So Dan, presenting the latest research results, even jokingly asked the question, “do we really need such good batteries?

However, such a hardy battery will be useful for robotaxi, in which the head of Tesla Ilon Mask plans to turn the company’s electric cars so that they begin to bring income to their owners. In addition, such batteries will be used in other projects of the company – energy storage systems Powerwalls, Powerpacks and electrifuges Tesla Semi.