How Long Does an Electric Car Battery Last?
As electric cars and other electric vehicles (EVs) become more popular, many consumers hoping to make the switch want to know: How long does an EV battery last? While battery life span varies by manufacturer and age, in general you can expect new batteries to rival and often exceed the longevity of drivetrain components on internal combustion engine (ICE) vehicles.
EV Batteries: The Basics
Electric cars are powered by rechargeable lithium-ion batteries, which are more energy dense than the lead-acid batteries found in internal combustion engines or rechargeable nickel-cadmium batteries found in some hybrids. A lithium-ion battery’s high energy density means it produces more power for its size, making it ideal for an electric car.
Because EVs are powered by the battery alone, they are far more simple and efficient than ICE vehicles. As lithium-ion batteries have decreased in cost by 97% over the last 30 years (opens in a new tab), experts believe that EVs will soon be as cheap to produce as ICE vehicles.
How Do EV Batteries Degrade?
EV batteries typically degrade due to temperature, cycles and time (opens in a new tab). Storage and operating temperatures have a huge impact on EV battery longevity; in general, warmer climates negatively affect the lifespan of an EV battery. As the battery goes through charge cycles — discharged while driving and charged back up while plugged in — it slowly loses maximum potential. However, simply not using or charging your EV battery does not mean it will last forever: Calendar degradation (opens in a new tab) is the battery losing life over time.
Recent findings from Stanford’s two-year study of 92 lithium-ion batteries (opens in a new tab) have shown that real-world driving conditions, such as stop-and-go traffic and rest periods, actually allow batteries to degrade more slowly compared to traditional laboratory testing methods. The research revealed that batteries perform better than expected during sharp, short accelerations, contrary to previous assumptions about degradation.
Unlike the lithium-ion batteries found in a phone or laptop, EV batteries utilize complex battery management systems (BMS) that regulate how the batteries are charged and discharged to prolong their life (opens in a new tab). That means your EV battery is most likely to experience temperature or calendar degradation.
How Long Does an Electric Car Battery Last?
Electric car batteries typically last 15–20 years, depending on climate, driving habits, and charging practices. Most automakers guarantee at least 70% capacity for 8–10 years or 100,000 miles under warranty (opens in a new tab). California extends that warranty to 10 years or 150,000 miles.
As EV battery packs become cheaper to manufacture, companies can create larger batteries with more energy potential, which in turn increases their mile-range. Additionally, the improved technology reduces the degradation of batteries, meaning that over time the maximum potential stays closer to the new battery.
These improvements, combined with the Stanford study’s findings about real-world performance, suggest that EV manufacturers could optimize their battery management software to further extend battery longevity based on actual usage patterns.
The Stanford research distinguishes between degradation caused by repeated charge-discharge cycles, which primarily affects commercial EV fleets, and degradation due to natural aging over time, which is more relevant for private EV owners using their vehicles mainly for commuting.
Because newer batteries already have greatly increased in mileage range, as they degrade they will still maintain a longer mileage range than batteries from just a few years ago. Finally, because lithium-ion batteries are made up of many individual cells, you rarely need to replace the entire battery (opens in a new tab) as it degrades. Instead, you can save money by simply replacing dead cells.
How Does EV Battery Longevity Compare to ICE Vehicles?
EV batteries now last as long as, or longer than, ICE vehicles. Recent studies show modern EVs can reach lifespans of 15–20 years, often matching or exceeding the average ICE vehicle lifespan of about 12–15 years.
On average, EV batteries only degrade at a rate of 1.8% of maximum capacity per year (opens in a new tab), and recent Stanford research suggests that EV batteries may last up to 40% longer than previously thought (opens in a new tab). This means the average EV battery could potentially last around 280,000 miles or more, more than double the lifespan of a typical ICE vehicle. This significant increase in expected longevity makes the value proposition of EVs even more compelling.
| Aspect | EVs | ICE Vehicles |
|---|---|---|
| Average lifespan | 15–20 years (up to 300,000 miles) | 12–15 years (~133,000–150,000 miles) |
| Battery/engine durability | EV batteries degrade ~1.8% per year; many last 20 years | Engines typically last 150,000 miles before major repairs |
| Maintenance needs | Fewer moving parts, lower routine maintenance | Higher maintenance (oil changes, exhaust, transmission, etc.) |
| Reliability trend | Improving rapidly; newer EVs match ICE reliability | Mature technology, but more wear-prone |
| End-of-life factors | Battery health and replacement cost | Engine/transmission failure, rust, mechanical wear |
And the future looks even brighter: some manufacturers are already promising even greater mileage capabilities, with Tesla setting their sights on a million-mile battery (opens in a new tab) and claiming they are not far from achieving this goal.
How To Extend EV Battery Life
While EV batteries are already durable, there are specific actions owners can take to further maximize battery lifespan. These include:
Follow EV Manufacturer Guidelines
First, it is important to follow your EV’s specific guidelines for optimal battery performance, as well as keep your vehicle’s software up to date. Because each EV manufacturer utilizes different battery chemistries and cooling technologies, each will have its own set of optimal operating and charging instructions.
Maintain Moderate Temperatures
EVs with liquid-cooled batteries see better battery life retention because they maintain lower operating temperatures. In general, storing and operating your EV in moderate climates is an effective way to extend battery life. Even if you live in a warmer climate, parking your vehicle in a garage or well-shaded area helps, as a vehicle spends most of its life parked.
Minimize Rapid Charging
While occasionally utilizing direct current rapid charging (DCRC) to power your vehicle is okay, if you can minimize the frequency of this charging method, you are likely to see less battery degradation later in its life. Luckily, EV Connect offers a variety of EV charging stations for businesses to ensure a number of efficient solutions for your vehicle. And remember: Don’t be afraid to use your EV, as frequent use is not a major factor in battery degradation.
An EV Battery’s Second Life
One of the most exciting aspects of EV battery degradation for eco-conscious consumers is the fact that batteries can still serve a sustainable purpose after they leave your EV. Even as they lose efficiency to power a car (usually at 70% of their maximum charge potential (opens in a new tab)), these powerful EV batteries retain enough life to pair with solar and can serve as secondary energy for your home. Some manufacturers even collect or buy back used batteries to sustainably power other projects, such as sports arenas. (opens in a new tab) You can feel secure in knowing that the sustainability of your EV’s power continues long after it leaves your vehicle.
EV batteries continue to decrease in cost, travel more miles on a charge and retain longer life spans. Experts already suggest that EV batteries will exceed the longevity of ICE components, and the technology improves every year. It’s all good news: Your EV battery will serve your needs for years to come, and it can even be sustainably recycled after its life from powering your vehicle.
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Sources
Junk Car Medics – Life Expectancy of the 75 Most Popular Vehicle Models in USA (opens in a new tab)
Geotab – How long do electric car batteries last? (opens in a new tab)
Stanford Report – Existing EV batteries may last up to 40% longer than expected (opens in a new tab)
National Grid – What happens to old electric car batteries? (opens in a new tab)
New Zealand Government “Gen Less” – EV Batteries and How Far They Can Go (opens in a new tab)
Union of Concerned Scientists – How Long Will My EV Battery Last? (and 3 Tips To Help It Last Longer) (opens in a new tab)