EV Batteries vs Global Warming

Picture Credit: Top Gear

As global temperatures rise, electric vehicles (EVs) face a new challenge, heat. Warmer conditions accelerate battery degradation, potentially becoming a “make or break” factor for drivers considering the switch from traditional fuel vehicles. While EVs remain central to reducing emissions, climate change itself may be complicating the transition.

Environmental concerns have pushed EV adoption to record levels. In the European Union, fully electric car sales overtook petrol-only vehicles for the first time in December 2025, according to industry data. Even as the EU softened its planned 2035 emissions ban, the momentum remained strong, with hybrid registrations also increasing and petrol car sales falling significantly across major markets.

Yet extreme weather remains a key concern for consumers. Studies suggest EVs can lose a substantial portion of their driving range in high temperatures. Research by automotive platform What Car? found that vehicles exposed to temperatures between 32°C and 44°C could lose up to 44 per cent of their advertised range. Automakers say heat speeds up chemical reactions inside batteries, which can accelerate long-term degradation.

However, technological improvements are beginning to address this challenge. A study from the University of Michigan compared older EV batteries produced between 2010 and 2018 with newer models manufactured between 2019 and 2023. Researchers found that while older batteries could lose up to 30 per cent of their lifespan under a global temperature rise of 2°C, newer battery designs showed far smaller declines, averaging only around three per cent.

These findings suggest growing confidence in EV technology, even in a warming world. Still, researchers warn that results may vary across regions. Markets in Europe and the United States typically use newer battery technologies, while countries in regions such as India or sub-Saharan Africa may rely on different vehicle fleets. As climate change intensifies, ensuring access to advanced battery technology could become another key challenge in the global EV transition.