Racing Toward Degradation: The Price of Faster EV Charging
2025 is being called the “year of the ultra-fast charging explosion” for new energy vehicles. While faster charging has made electric cars more convenient and reduced range anxiety, it has also raised concerns about how it affects battery health over time.
Many people believe that, like mobile phones, using ultra-fast charging too often shortens battery life. This is especially worrying because replacing an EV battery can cost as much as half the price of a new car - or more than the car’s resale value.
Owners may be forced to choose between a costly battery replacement or scraping in view of buying a new vehicle altogether.
This is even more true for ride-hailing drivers, who often rely on ultra-fast charging to stay on the road longer and have seen their batteries age more quickly. Surveys show that EVs used for ride-hailing and charged at high speeds over 70% of the time can see battery health drop from 100% to 85% in just two years.
Research from Tsinghua University found that charging above 120 kW vs V would y frequently can reduce battery life by up to 40% compared to slow charging.
In China, automakers are required to provide at least an 8-year or 120,000 KM warranty for major components like batteries. Most companies follow this rule and will replace batteries that fall below 75% health during the warranty period. However, getting a warranty claim approved is oftentimes complicated.
Additionally, many “lifetime warranty” offers come with strict conditions. These include - only covering the original owner, setting mileage limits, requiring all service to be performed at official centres and the ban on vehicles being used in the commercial sector.
Some even go to the extent of limiting how often you can use ultra-fast charging. This can make it difficult for high-usage drivers, like those in ride-hailing, to qualify for warranty coverage.
There’s also a lot of confusion about what warranties actually cover. Many only apply to manufacturing defects, not normal battery wear and tear. Still, more than half of EV owners wrongly believe a lifetime warranty means free battery replacement forever. Only 23% fully understand their warranty terms.
To protect battery health, experts recommend limiting ultra-fast charging to under 40% of your total charges. It's better to use slow charging whenever possible. Additionally, avoid ultra-fast charging when your battery is below 10% or above 90% - more wear happens at this levels.
To make ultra-fast charging truly sustainable, the industry needs to balance speed with battery protection. This means better thermal controls, smarter battery management systems and more importantly clearer policies.
Only through this mix of technology, education and regulation can brands deliver on the promises such as the “10-year worry-free” battery life.
Written By
KS
More then half his life spend being obsessed with all thing go-fast, performance and automotive only to find out he's actually Captain Slow behind the wheels...oh well! https://www.linkedin.com/in/kumeran-sagathevan/
JPJ Running Numbers
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SJL2702
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QAB5039L
Last updated 15 Jun, 2025
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Last updated 12 Jun, 2025
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