Millions of drivers may unknowingly ‘overheat’ cars in ‘deterioration’ warning

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Millions of drivers run the risk of overheating their car this summer due to a little-known safety risk.

Road users have been warned lithium-ion batteries found in electric cars could be affected under certain conditions in a major concern for owners.

Experts at LeaseElectricCar warn the batteries do not react well to extreme temperatures and could decline quicker.

ZapMap reports there are around 840,000 fully-electric cars on UK roads with a further 520,000 plug-in hybrids meaning more than a million could be affected.

Tim Alcock, spokesperson for urges road users to change their driving habits to avoid being caught out.

He explained: “The lithium-ion batteries found in EVs will likely overheat if owners are not careful when the temperatures are getting hotter.

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“It’s best to get into these habits to preserve your electric car battery and help extend its lifespan, instead of leaving it to overheat and run the risk of deteriorating the battery.

“Drivers should be mindful about parking in the shade, especially during the hottest hours of the day, or park up inside a garage. Also avoiding charging in the middle of the day will help keep the battery temperature regulated.

“Only charging up to 80 percent during the summer can stop cell degradation – where the battery loses the capacity to reach a full charge again.

“Air con can reduce the range of electric cars, so rolling down the windows instead will still keep the car cooler, but prevent any travel issues.” Experts also urge drivers not to always use rapid charge points to top up their cars.

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They warn this could have a “detrimental effect on the battery” with owners encouraged to use slower options during the summer months.

This is because the accelerated electrical waves alongside the hot temperatures could cause severe damage.

Motorists should also only charge tier vehicles once the car has cooled down as this will help keep the temperatures regulated.

Damage to the battery is likely to reduce a car’s overall range and increase the time it takes to charge.

According to Ev-Lectron, EV range may decrease by 17 percent when temperatures are as high as 35 degrees celsius.

However, Tesla has denied the claims and suggested their Model S would only drop its total distance by around one percent.

Affected batteries will also have a much-reduced lifespan instead of the average 10-20 years.

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