Skip navigation
Skip navigation
You are using an outdated browser. Please upgrade your browser.
Dr Christian Rosenkranz (Clarios)

Modern vehicle electronics and fuel-saving measures, such as stop-start technology require ever more power from the battery

- July’s hot days reaching record temperatures could have permanently damaged car batteries

- Battery check ensures vehicle safety

Watford, 4 November 2019 Arctic winds and plummeting temperatures heading towards Britain could lead to an unwelcome spate of battery breakdowns, engineers are cautioning. This summer’s record-breaking temperatures may leave car batteries unable to cope with the cold, as extreme or consistent exposure to heat can have a big impact on automotive batteries.

Battery experts at Clarios, the manufacturer of VARTA® car batteries, say that, contrary to popular belief, extreme or consistent exposure to heat can also have a severely detrimental effect on batteries. However, this manifests itself the following winter, when older batteries are unable to cope with the enhanced demands of cold weather driving.

Modern vehicle electronics and fuel-saving measures, such as stop-start technology require ever more power from the battery, which means this problem is only set to get worse.

Motoring organisations regularly warn motorists to check their batteries every autumn, and say that flat batteries are responsible for 40% of breakdown assistance call-outs. This winter could be particularly challenging for UK drivers because batteries have not only been exposed to extreme heat, but they also have to serve ever more complex and power-hungry car electronics.

Dr. Christian Rosenkranz, of Clarios, said: “Many drivers think that cold weather does damage to the battery, but it is the heat that is the start of its downfall. Heat dramatically shortens the life-span of a battery, so by the time winter comes, older batteries are close to their limit.”

July saw a new record high temperature of 38.7°C recorded in Britain, and even though it may not feel like it’s been a long hot summer, car batteries will have been subjected to days far above their optimal temperature of 20°C - especially as cars parked in the sun will potentially get far hotter than the official air temperature reading.

Dr. Rosenkranz explains that high temperatures lead to self-discharge of the battery and cause its electrochemical parts to age more quickly. The problems start to show in winter, when more energy is needed to start the engine.

“{Modern cars are loaded with electronics, and are therefore more dependent on a good battery than ever. They need a battery that can give its full specified performance in order to comfortably supply all the functions that demand power from it,” Dr. Rosenkranz added.

With the battery in many new cars no longer easily accessible under the bonnet - it is often installed in the boot or under a seat – Dr. Rosenkranz recommends having your battery tested by a professional before winter sets in. The relatively modest price of replacing battery at a convenient time, in a workshop, will be far smaller than the hassle and additional cost and inconvenience of an unexpected battery-related breakdown.

For more information please contact:

Christian Hannestad
The Communications Business on behalf of Clarios
Tel 0131 208 1500

Clarios EMEA
Anja Heidmann
Am Leineufer 51
30419 Hannover
Tel: +49 (0)511 975 1032

About Clarios
Clarios, formerly Johnson Controls Power Solutions, is a world leader in advanced energy storage solutions. We partner with our customers to meet increasing market demand for smarter applications, on a global scale. Our 16,000 employees develop, manufacture and distribute a portfolio of evolving battery technologies for virtually every type of vehicle. Technologies that deliver uniquely sustainable, next-generation performance, and bring reliability, safety and comfort to everyday lives. We add value at every link in the supply chain, contributing to the progress of the communities we serve and the planet we all share. Learn more about Clarios at Clarios is a subsidiary of Brookfield Business Partners, a business services and industrials company focused on owning and operating high-quality businesses that benefit from barriers to entry and/or low production costs.

This press release was distributed by ResponseSource Press Release Wire on behalf of Denise Hannestad (The Communications Business) in the following categories: Motoring, Travel, Transport & Logistics, for more information visit