If you’re asking how long do EV batteries last, the answer is reassuring: Geotab’s fleet data shows about 2.3% capacity loss a year, or roughly 81.6% left after eight years. Below, you will find what speeds that wear up or slows it down.
Our guide to electric vehicles covers the wider picture, and this page focuses on battery wear.
| Item | Value |
|---|---|
| Average annual battery degradation | 2.3% per year |
| Average capacity left after eight years | 81.6% |
| Degradation with heavy DC fast charging above 100 kW | 3.0% per year |
| Degradation with mainly AC or lower-power charging | 1.5% per year |
| Extra degradation in hot climates | About 0.4% faster per year |
| Vehicles in the study | More than 22,700 EVs across 21 models |
The figures come from Geotab’s 2025 fleet study, as reported by FreightWaves in February 2026 and Electric Autonomy in January 2026. Figures like these can change as new data arrives, so check the source before you rely on them.
What real-world data says about EV battery life
The most useful evidence on battery lifespan comes from telematics, which tracks real vehicles instead of lab cells. Geotab’s latest study covers more than 22,700 EVs across 21 models from fleets in Canada, the U.S. and Europe, and it found average degradation of 2.3% per year, according to Electric Autonomy.
Put another way, the average battery keeps 81.6% of its original capacity after eight years, per the same report. New Atlas adds that Geotab says this rate works out to a lifespan of 13 years or more.
That compares well with how long people keep cars. A 2024 study by The Zebra found that people in the US own their longest-kept cars for an average of about eight years, as New Atlas notes.
In range terms, the loss is small. CompleteCar.ie calculates that a small EV such as a Renault 5 loses around 10 km of range a year, while a Volkswagen ID.4 loses 14 km from a total claimed range of 565 km.
Why did the average rise from 1.8% to 2.3%?
Geotab’s 2024 study reported 1.8% a year, so the newer number looks like a step backwards. FreightWaves reports that the latest study includes 21 models instead of 11, with a higher concentration of newer vehicles that typically age faster at first.
The same report notes that 2.3% matches Geotab’s initial 2019-2020 study. In other words, the rise reflects a different and larger mix of vehicles and more fast charging, not a sudden failure of battery technology.
The 2024 report said batteries could last 20 years or more at 1.8% a year, and that some of the best-performing models showed only 1.0% annual degradation, according to Electric Autonomy. Treat 20 years as a projection tied to that lower rate, not a promise.
One caveat applies to every figure here: degradation is expected to be non-linear, with a faster early drop, a slow middle and a sharper fall at the end. Geotab said in 2024 that it hadn’t observed enough batteries reach the end-of-life drop to predict when it will occur, per Electric Autonomy.
What speeds up battery degradation
Geotab’s data points to a few factors, with charging power the strongest operational influence, according to FreightWaves. Here is how they stack up:
- Fast charging: vehicles relying heavily on DC fast charging above 100 kW averaged 3.0% degradation per year, roughly double the 1.5% seen with AC or lower-power charging.
- Heat: vehicles in hot climates degraded about 0.4% faster per year than those in mild conditions.
- Heavy use: high-utilization vehicles showed degradation about 0.8% higher than low-use vehicles.
- Model and chemistry: differences between models often come down to battery chemistry and pack temperature control, Electric Autonomy reported in 2024.
Fast charging matters partly because the process generates more heat. Even so, Geotab says the average for frequent high-power users is still only 3.0% per year, per FreightWaves.
Heavy use costs less than you might expect. After eight years, low-use vehicles are projected to retain 88% state of health and high-use vehicles 81.6%, according to Electric Autonomy.
A separate test points the same way. Germany’s ADAC put a Volkswagen ID.3 through four years and almost 200,000 km, including lots of fast charging, and net degradation was just 2.0% after software updates, CompleteCar.ie reports.
One gap to keep in mind: the study did not cover colder climates, so the heat figure shows only one side of the weather story.
Do you really need to keep your battery between 20% and 80%?
Automakers have long recommended limiting DC fast charging and keeping charge between 20 and 80%, as Electric Autonomy noted in 2024. Geotab’s newer data is more relaxed about it.
According to FreightWaves, the difference between users who cap charging at 80% and those who sometimes charge to 100% proved negligible. The problem starts only when a vehicle sits in those extreme states for more than 80% of its total time.
In practice, charge to what your day needs and then drive. If you want the basics of cells and packs first, read our explainer on how do electric car batteries work.
How to look after your EV battery
You do not need to baby the pack, but a few habits help. Follow these steps in order of impact:
- Charge slowly when you can. Mainly AC charging, such as a home charger, brought average degradation down to 1.5% per year, according to CompleteCar.ie.
- Save high-power DC charging for when you need it. To compare charger speeds, start with our page on ev charging levels explained before you choose where to plug in.
- Avoid parking at the extremes. Long stretches left very full or very empty are the real risk, and this matters most when the car won’t be used for a while.
- Keep driving it. Geotab’s research says that the more you drive, the better value you get, per Electric Autonomy.
Geotab’s data comes mainly from fleets, so private owners with gentler schedules may see different results. Still, the pattern is consistent: slower charging and normal use protect capacity best.
Frequently asked questions
How long do EV batteries last in years?
Show answer
Geotab’s 2025 study, as reported by Electric Autonomy, found average degradation of 2.3% per year, which leaves 81.6% after eight years. New Atlas reports that Geotab puts the lifespan at 13 years or more. These are fleet averages, so your result will vary.
Will I need to replace my EV battery?
Show answer
Geotab’s 2024 research said batteries in the latest EV models will comfortably outlast the usable life of the vehicle and will likely not need to be replaced, as of its September 2024 report. Geotab also notes it has not yet seen enough end-of-life batteries to predict the late-life drop.
Is fast charging bad for an EV battery?
Show answer
It adds wear: heavy DC charging above 100 kW averaged 3.0% degradation per year against 1.5% for AC or lower-power charging, per FreightWaves. Using it when you need it is fine, but slower charging is kinder when the car will sit for hours.
Does driving more shorten battery life?
Show answer
Only slightly. Geotab projects that low-use vehicles keep 88% state of health after eight years and high-use vehicles keep 81.6%, according to Electric Autonomy.
