EV Battery Health Study: Ioniq 5 Leads at 150,000 km

Key takeaways

• Hyundai ranked ahead of Tesla in a large EV battery study.
• The analysis covered about 500,000 battery tests.
• Battery health shows how much charging capacity an EV still has.
• The result does not mean every Hyundai battery will last longer.

Hyundai has taken the top spot in a major study of EV battery health. EV battery health means how much of a battery’s original charging capacity remains. The analysis examined about 500,000 tests and placed Hyundai ahead of Tesla for long-term battery condition. That matters because the battery is often the most costly part of an electric car.

What did the EV battery health study find?

The study compared battery data from a huge group of electric vehicles. It looked at how batteries held up after repeated use, rather than judging cars after only a few months.

Hyundai came out on top, while Tesla ranked behind it. The result gives Hyundai a useful boost because many buyers worry that an EV battery will lose range too quickly.

Still, the headline needs care. The 500,000 figure refers to tests and data points, not necessarily 500,000 different cars. A test can measure one vehicle more than once, so readers shouldn’t treat the number as a count of owners.

Hyundai’s result means its vehicles showed stronger battery condition in this data set than Tesla vehicles. It does not prove that every Hyundai battery will outlast every Tesla battery.

Why does EV battery health matter to drivers?

An EV battery stores the power that moves the car. As the battery ages, it may hold less energy, so the car can travel fewer miles between charges.

For example, a car that once drove 300 miles might lose some of that range over time. A battery at 80% health could, in simple terms, offer about 240 miles under similar driving conditions.

That figure is only an example. Cold weather, fast driving, hills and heavy heating or cooling can cut range too. Battery health is one factor, not a promise of a fixed distance.

Battery replacement also affects a used EV’s value. A healthy battery can make a second-hand car easier to sell, while a weak battery may lead buyers to ask for a lower price.

How did Hyundai beat Tesla?

The study does not show that one simple feature caused Hyundai’s lead. Battery size, software, driving habits, climate and charging choices can all shape long-term results.

Hyundai uses different battery packs across its models and markets. Tesla also uses several battery types, including packs with different chemistries and charging limits.

Battery chemistry means the materials inside the cells. Some types handle frequent charging well, while others can offer more range or power.

Charging speed may matter too. Frequent use of high-power fast chargers can create more heat than slower home charging. Car software can limit charging levels to protect the pack, but owners still face different conditions.

Hyundai’s strong result should therefore be read as a group finding. It is not a head-to-head lab race between one Hyundai model and one Tesla model.

Measure	What the study or context shows	Why it matters
Tests reviewed	About 500,000	Offers a broad view of battery condition
Top brand in the report	Hyundai	Suggests strong results across the data set
Comparison brand	Tesla	Finished behind Hyundai in the ranking
Common replacement concern	About 8-10 years	Many buyers use this period to think about battery life

What numbers should EV buyers watch?

Battery health is usually shown as a percentage. A reading of 100% means the battery holds about as much energy as when it was new.

Many experts view roughly 70% to 80% remaining capacity as a point where drivers may notice a clear range loss. That is not a universal failure line, because cars and warranties differ.

Some EV warranties cover batteries for eight years or 100,000 miles. The exact promise depends on the brand, model and country, so buyers should read the warranty before signing a deal.

Illustrative battery capacityNewUseOlder100%80%This is an example, not the study’s brand score

Owners can check battery reports, warranty records and real-world range. A test drive can also reveal warning signs, such as a sharp range drop or unusual charging limits.

What does the result mean for Hyundai and Tesla?

Hyundai can use the result to support its claim that battery durability is more than a lab promise. That may help the company compete with Tesla, which built an early lead in electric cars.

Tesla still has a large fleet and years of battery data. A lower position in one study does not erase that history, and model-by-model results may look different.

For shoppers, the best choice is not simply the brand at the top. Check the exact model, battery type, warranty, service record and expected range.

Readers can also compare battery details in our guide to the Range Rover Electric battery and range. For wider energy storage context, see our report on Google’s zinc battery project.

The study is useful because it turns a common fear into a question buyers can measure. But EV battery health depends on the car and the way its owner charges and drives it.

Hyundai’s lead is good news for the brand, but the clearest lesson is simple: buyers should ask for battery data, not rely on a badge alone.

FAQs

What is EV battery health?

EV battery health is the share of an electric car’s original charging capacity that remains.

How many tests did the study review?

The analysis covered about 500,000 battery tests and data points.

Why did Hyundai rank ahead of Tesla?

Hyundai showed stronger long-term battery condition in the study’s data. The report does not name one single cause.

When should buyers check battery health?

Check it before buying a used EV and compare the result with the car’s warranty terms.

For background on Hyundai’s electric vehicle range, visit the company’s official Ioniq 5 information page. Battery research and ownership data can change as more cars reach older ages.

What the verified record says

A large EV battery health dataset from testing company Aviloo places the Hyundai Ioniq 5 near the top of a 20-model comparison at 150,000 kilometres. Reports from TechRadar, InsideEVs via Yahoo Autos and AutoNext describe more than 500,000 independent tests collected from 2022 to 2026. The reported median is roughly 93% for the Ioniq 5 and about 90.3% for the Tesla Model Y at that distance.

What the headline does not prove

The ranking should not become a universal brand verdict. Reports differ slightly on the Ioniq 5 figure—about 92.8% to 93.37%—which may reflect rounding, pack variants or the way results were grouped. The dataset was produced by a commercial testing company and is not described as a peer-reviewed controlled trial. Cars that receive a test may not perfectly represent every vehicle on the road. Climate, fast-charging frequency, storage state of charge, pack chemistry, software buffers and driving history can create large differences within one model.

This distinction prevents a common news-reading error: treating an announcement, allegation, target or median as a completed result. Dates and attribution matter. Where a company, regulator or political office supplies a number, that source is named. Independent coverage helps confirm the event, but it does not turn a disputed assertion into an established fact.

Why this development matters

The strongest lesson is that model medians cannot price an individual used vehicle. Coverage of the dataset notes spreads of more than ten percentage points among cars of the same model and age. A buyer therefore needs a measured state-of-health result, diagnostic context and warranty history. A nominal 90% figure usually refers to usable capacity relative to the tester’s baseline, not a promise that every trip delivers exactly 90% of the original range. Temperature, tyres, speed and cabin heating still affect road range.

For decision-makers, the practical response is to identify which facts change an action today and which ones merely deserve monitoring. Consumers should verify eligibility or device support. Businesses should preserve records and model several outcomes. Investors should read filings instead of inferring completed transactions from agendas. A disciplined reading reduces the risk of acting on a claim that later changes.

What to watch next

Used-EV marketplaces can improve trust by showing who performed the test, when it was performed, the method used and whether software or pack work occurred afterward. Buyers should compare the reported state of health with remaining battery warranty, charging behaviour and any diagnostic fault codes. They should also ask whether the test measures the full pack or estimates capacity from a shorter drive. The study is encouraging evidence that many packs retain substantial capacity, but a pre-purchase test remains more useful than a headline ranking.

Read Lapaas Voice’s overview of India’s EV support landscape and its investment pipeline analysis.

Source and methodology note

This article uses a primary source where one is public and checks the central claim against at least two independently published reports. Source links are placed beside the facts they support. Interpretive passages are clearly framed as analysis. The article will be updated if a court, company, regulator or public agency releases a document that materially changes the confirmed record.

FAQs

Is the main development final?

No. The confirmed event has occurred, but the broader outcome is still developing. The article separates what has happened from what may happen next.

Why do different reports sometimes show different numbers?

Differences can come from rounding, scope, timing or the source’s methodology. Use the cited primary record and treat estimates as estimates.

What is the safest way to use this information?

Verify the latest official document before making a legal, financial, purchasing or operational decision. News explains the record; it does not replace professional advice or a current eligibility check.