EV Battery Warranty in Australia: What Every Brand Covers and How to Claim

EV battery warranty in Australia typically runs 7 to 10 years and guarantees at least 70 per cent of original capacity. That covers the most expensive single component in your car, worth $6,000 to $20,000 to replace. Every manufacturer structures their warranty slightly differently, and the gap between best and worst coverage is wider than most buyers realise.

The real question most people have is not the headline number on the warranty card. It is what actually triggers a valid claim, what voids one, and what happens when the battery fails outside the warranty window. Australian Consumer Law provides protections that go beyond the printed warranty, but knowing those rights and how to use them is half the battle.

Here is every major EV battery warranty sold in Australia right now, what the fine print says, and what to do if something goes wrong. For a broader ownership cost picture, see our EV total cost of ownership breakdown.

Every EV Battery Warranty in Australia Compared

Battery warranties vary across three dimensions: time, kilometres and minimum capacity retention. Some brands cap one but not the other.

Brand	Models (AU)	Time	Km Limit	Min Capacity
Tesla	Model 3 RWD (LFP)	8 years	160,000 km	70%
Tesla	Model 3 LR/Perf, Model Y	8 years	192,000 km	70%
BYD	Atto 3, Seal, Dolphin, Sealion 7	8 years	160,000 km	70%
Hyundai	IONIQ 5, IONIQ 6, IONIQ 9	8 years	160,000 km	70%
Kia	EV6, EV9	7 years	150,000 km	70%
MG	MG4, ZS EV	10 years	250,000 km	70%
Volvo	EX30	8 years	160,000 km	70%
Polestar	Polestar 2	8 years	160,000 km	70%
Volkswagen	ID.4	8 years	160,000 km	70%
Cupra	Born	8 years	160,000 km	70%
Chery	E5	8 years	Unlimited	70%
GAC Aion	Aion V	8 years	200,000 km	70%
Geely	EX5	8 years	Unlimited	70%
Xpeng	G6	8 years	160,000 km	70%

Sources: tesla.com/en_au, byd.com/au, hyundai.com.au, kia.com.au, mg.com.au, volvocars.com/au, polestar.com/au, volkswagen.com.au, cupraofficial.com.au, zecar.com (warranty comparison, 2026)

A few standouts. MG offers Australia’s longest EV battery warranty at 10 years and 250,000 km for private use (EV Central, 2024). That is nearly double the industry standard and makes the MG4 one of the best-protected budget EVs on the market. Chery and Geely both offer unlimited kilometre coverage on their batteries, a genuine advantage for high-km novated lease drivers. Kia’s 7-year term is the shortest in this table, and its 150,000 km cap is the tightest.

What “70% Capacity” Actually Means

Every warranty in the table above promises at least 70 per cent of original usable capacity at the end of the warranty period. But what does 70 per cent feel like in practice?

Take a BYD Atto 3 with a 60.48 kWh pack and a claimed range of 420 km. At 70 per cent capacity, you would have about 42.3 kWh usable, translating to roughly 294 km of WLTP range. On the highway at 110 km/h, real-world range would sit closer to 220 to 250 km (using the standard 75 to 85 per cent WLTP adjustment for Australian highway conditions).

That is still more than six times the average Australian daily commute of 35 km (ABS, 2020). For most owners, 70 per cent capacity after 8 years would barely register in daily driving.

In reality, most EVs hold well above 70 per cent. Owner-reported data from Tesla vehicles suggests average degradation of roughly 4 per cent per 100,000 km, meaning a car driven 15,000 km per year would retain about 95 per cent capacity after 8 years. BYD’s LFP Blade battery chemistry degrades even more slowly, with fleet data suggesting less than 3 per cent loss over 100,000 km in Australian conditions (EVC Ownership Survey, 2024).

LFP vs NMC: How Battery Chemistry Affects the EV Battery Warranty

The chemistry inside your battery pack changes both how it ages and how you should treat it. Two types dominate the Australian market.

LFP (Lithium Iron Phosphate) is used in every BYD sold in Australia, the Tesla Model 3 RWD, Tesla Model Y RWD, the MG4 Excite 51, the Geely EX5 and the Kia EV5. LFP cells tolerate full charge cycles well and are rated for 3,000 or more cycles before hitting 80 per cent capacity. Tesla’s Australian guidance is to charge LFP variants to 100 per cent daily and fully charge at least once a week to recalibrate the battery management system.

NMC (Nickel Manganese Cobalt) is used in Tesla Long Range and Performance models, the Hyundai IONIQ 5 and IONIQ 6, the Kia EV6 and EV9, and the Polestar 2. NMC cells offer higher energy density (more range for less weight) but are more sensitive to sustained high states of charge. Manufacturers typically recommend keeping NMC batteries between 20 and 80 per cent for daily use.

Both chemistries carry identical warranty terms from most manufacturers. The practical difference is lifespan: LFP packs will almost certainly outlast their warranty with wide margin. NMC packs should too, provided the battery management system does its job and the car is not repeatedly DC fast-charged in extreme heat.

For a deeper comparison of the two chemistries, see our LFP vs NMC battery guide.

What Voids an EV Battery Warranty in Australia

Warranty exclusions are spelled out in each manufacturer’s warranty handbook. The common ones across all brands:

Physical damage from accidents, floods, fires or impacts to the battery tray. Underbody damage from severe potholes or speed bumps can crack the battery casing. If the battery management system detects a fault from physical impact, it flags in the diagnostic log.

Unauthorised modifications to the battery, high-voltage system or cooling system. Aftermarket performance tunes that alter charging or discharging behaviour outside factory parameters are the most common example.

Environmental damage from saltwater immersion, chemical exposure or prolonged submersion in floodwater. If you drive through standing water deeper than the battery tray, get the car inspected immediately.

Neglect of servicing varies by brand. Tesla requires no scheduled servicing for warranty validity, while BYD and Hyundai recommend annual service inspections. Skipping recommended services does not automatically void the warranty, but it weakens your position in a dispute.

Things that do NOT void your warranty:

• Using a third-party Type 2 AC charger or CCS2 DC charger that meets Australian standards
• Charging at public fast-chargers regularly (some degradation is normal; using DC chargers is not a warranty exclusion)
• Installing a home wallbox from any manufacturer
• Having the car serviced by an independent mechanic (under Australian Consumer Law, the manufacturer cannot require you to use only authorised dealers for routine service)
• Charging to 100 per cent on LFP batteries (this is the recommended practice)
• Towing within rated limits

Australian Consumer Law: Your Rights Beyond the Warranty Card

The printed warranty is a floor, not a ceiling. Under the Australian Consumer Law, products must be of acceptable quality and durable for a reasonable period.

A “reasonable period” for an EV battery extends well beyond the 7 or 8 year warranty. The ACCC considers the price of the product, the nature of the product and what a reasonable consumer would expect. For a $50,000 to $90,000 vehicle, a reasonable expectation is that the drivetrain (including the battery) lasts 10 to 15 years with proper care.

This means:

• If your battery fails catastrophically 6 months after the warranty expires, you have strong grounds to demand a repair or replacement from the manufacturer
• If degradation reaches an unusable level significantly before what a reasonable consumer would expect, you can lodge a complaint
• The manufacturer must prove the failure was caused by misuse, not the other way around

The remedy depends on the severity. A major failure (the battery stops holding charge or fails dangerously) entitles you to a replacement, repair or refund. A minor failure entitles you to a repair within a reasonable time.

To pursue an ACL claim, start with the dealer. If the dealer refuses, contact the manufacturer directly. If neither resolves it, lodge a complaint with your state’s consumer affairs tribunal (NCAT in NSW, VCAT in Victoria, QCAT in Queensland). These tribunals handle motor vehicle disputes regularly and filing fees are typically under $100.

How to Make a Battery Warranty Claim

The process is straightforward, but documentation matters.

Step 1: Notice the symptom. The most common trigger is noticeable range loss. If your car that used to do 350 km on a charge now struggles to hit 250 km under the same conditions, that is worth investigating. Sudden failure (the car will not charge or throws a battery fault) is less common but more urgent.

Step 2: Run a diagnostic. Book an appointment with your authorised dealer or service centre. They will run the manufacturer’s battery health diagnostic, which reads cell voltage, internal resistance and total degradation from the battery management system. Tesla owners can now access battery health data directly through the app (available from April 2025).

Step 3: Get the report in writing. Ask for a printed or emailed copy of the diagnostic report showing the current state of health (SOH) percentage. If SOH is below the warranted threshold (typically 70 per cent), you have a valid claim.

Step 4: Lodge the claim. The dealer handles the claim with the manufacturer. Battery replacements under warranty are done at no cost to you, including labour. Turnaround time varies. Tesla typically replaces packs within 1 to 2 weeks. BYD and Hyundai may take longer, depending on parts availability.

Keep these records: all service invoices, charging logs (if your car tracks them), any correspondence with the dealer, and the original purchase documentation including the warranty booklet.

How Australian EVs Are Actually Holding Up

Real-world data is encouraging. Modern EV batteries are lasting far longer than the warranty period suggests.

Splend, an Australian rideshare fleet operator, published battery health data from over 1,100 state-of-health readings on high-mileage vehicles in their fleet (Splend, 2025). The results are reassuring:

Model	Readings	Average SoH	Avg Remaining Range
Polestar 2	544	95%	~420 km
Tesla Model 3	250	95%	~385 km
Tesla Model Y	373	94%	~363 km

These are cars driven far more aggressively than the average private owner. The 94 to 95 per cent average state-of-health across the fleet sits well above the 70 per cent warranty threshold. Owner-reported Tesla data from 2025 showed an average degradation rate of approximately 4 per cent per 100,000 km, meaning a car driven 15,000 km per year would hit the 8-year warranty mark with roughly 95 per cent capacity remaining.

Geotab’s 2025 global fleet study of 22,700 EVs found average degradation of 2.3 per cent per year, projecting 81.6 per cent capacity after 8 years (Geotab, 2025). That study also flagged heavy DC fast charging (more than 12 per cent of sessions above 100 kW) as the biggest degradation accelerator, roughly doubling the annual loss rate to 3 per cent per year versus 1.5 per cent for AC-primary users.

Pack replacement rates under warranty sit below 1 to 2 per cent across all major brands (Cars24, 2026). The vast majority of EV batteries will outlive the car they are fitted to.

Tips to Maximise EV Battery Lifespan in Australia

These habits keep degradation to a minimum, though modern battery management systems handle most of the work:

For NMC batteries: Keep daily charge between 20 and 80 per cent. Charge to 100 per cent only before long trips. Avoid leaving the car at 100 per cent for extended periods. Precondition the battery before DC fast charging in summer.

For LFP batteries: Charge to 100 per cent regularly. Tesla recommends at least once a week for calibration. LFP chemistry is less sensitive to high states of charge.

For both chemistries: Minimise repeated DC fast charging in extreme heat (above 40 degrees). Park in shade or a garage where possible. Avoid deep discharging below 5 per cent regularly. Keep the car plugged in during extended periods of non-use so the thermal management system can run.

Heat is the enemy of battery longevity, and Australia has plenty of it. Cars with active liquid cooling (Tesla, BYD, Hyundai, Kia, Volvo) manage heat well. Older air-cooled EVs like the early Nissan Leaf degraded faster in hot climates because they lacked this protection.

For more on EV servicing costs and what ongoing maintenance looks like, see our dedicated guide. You can also compare EV ownership economics in our EV vs petrol total cost of ownership breakdown.

Frequently Asked Questions