Syed Saif Ul Hassan 
Nov 12, 2025
An undated image. — Unsplash
We're accustomed to seeing electric vehicles (EVs) with massive batteries offering hundreds of miles of range on a single charge, but have you ever wondered which EV brand has the most durable batteries under the hood? If so, be all ears, as Mercedes-Benz has claimed its latest EV battery is the most durable it has produced.
The pioneering car maker explained that it passed its 'most durable EV batteries' through rigorous durability tests, making the battery retain over 90% of its capacity after extensive stress cycles, including extreme fast charging and challenging thermal conditions.
It must be noted that if these results are independently verified, they could greatly benefit EV owners, as battery longevity comprises a substantial chunk of the total EV ownership cost.
Mercedes' testing programme involved multiple stages, including laboratory stress tests, controlled mileage accumulation, and extreme weather simulations. This approach was adopted to accelerate the detection of long-term degradation patterns.
In a real-world demonstration, the carmaking giant showcased a test vehicle achieving exceptional distances on a single charge, indicating improvements in energy density and efficiency.
What validates Mercedes' claims about its immensely efficient EV batteries is a few independent studies showing that Mercedes models maintain stable battery performance up to around 200,000 kilometres, in line with the company's claims. However, variations in real-world degradation depend on battery chemistry, thermal management, and charging behaviour.
Consistent with the evolving battery landscape, Mercedes is reportedly exploring advanced chemistries like lithium metal and solid-state cells, which promise higher energy density and improved cycle life.
If Mercedes' claims are corroborated by a standardised testing method, this could enhance consumer confidence in EVs and transform the economics of EV ownership.
