Mikkel Christensen
Not all EV batteries age the same way, and chemistry is becoming a key factor.
Not all EV batteries age the same way, and chemistry is becoming a key factor.
Newer lithium iron phosphate (LFP) packs are increasingly seen as more durable under heavy use.
That trend is now being backed up by real-world data. A high-mileage Tesla Model Y is offering a strong example.
Battery first
Unlike many earlier EVs, this Model Y uses an LFP battery. According to InsideEVs, this type can handle frequent full charging with less long-term wear.
By comparison, nickel-based batteries typically offer more range but degrade faster. Many manufacturers recommend limiting charge levels to preserve them.
Industry data suggests most EV batteries lose around 10–20% capacity over time. That makes this case particularly notable.
Real-world case
The Model Y in question has travelled more than 111,000 miles as a taxi. Despite the heavy usage, its battery health remains high.
Testing shared by YouTuber Richard Symons showed around 92% state of health. That means most of the original range is still available.
InsideEVs reported the car relied almost entirely on fast charging. Only a small amount of energy came from slower home charging.
Rethinking usage
Fast charging is often seen as harmful to battery life. Some studies suggest it can accelerate degradation under certain conditions.
However, this example shows results can vary significantly. Battery design and usage patterns appear to matter more than charging type alone.
Experts note that degradation tends to slow after early use. This helps maintain stable performance over longer periods.
Bigger impact
The findings could have implications beyond individual owners. High-mileage durability is especially important for taxis and fleet vehicles.
Stronger battery health may also support resale values over time. Buyers are increasingly focused on long-term reliability.
According to InsideEVs, modern EV batteries may last longer than expected. As technology improves, concerns about lifespan could continue to ease.
Sources: InsideEVs, YouTube (RSEV)
