Are EV batteries covered by warranty?

Yes. US law requires at least an 8-year / 100,000-mile battery warranty on EVs (California and some other states extend it further, and several makers offer 10 years). It covers defects and, on many cars, capacity loss below a set threshold (often 70%). The warranty check in this calculator tells you whether you're still inside that window: if you are, a defective pack is replaced for free.

How often do EV batteries actually need replacing?

Rarely. Modern lithium-ion packs are engineered to outlast the rest of the car, and large fleet studies show most lose only a few percent of capacity over many years. Outright failures are uncommon and usually caught under warranty. Far more often a pack simply loses a little range gradually rather than needing a full replacement.

Is this an exact replacement quote?

No, it's an evergreen estimate from editable assumptions, not a dealer quote. Actual cost depends on your make, whether a remanufactured or used pack is an option, and local labor. Pack pricing is also falling year over year. Use it to ballpark the figure and check your warranty, then confirm with a dealer or specialist. For the bigger picture, pair it with our EV depreciation and cost-to-own calculators.

EV Battery Replacement Cost Calculator

Estimate what it would cost to replace an EV battery pack: by battery size and current pack pricing, split into pack and labor. Pick your model to set the kWh, then run the warranty check: most owners asking this are still inside the 8-year / 100,000-mile coverage and would pay nothing for a defective pack.

Pick your EV (sets battery size)

Battery size

kWh

Replacement pricing (edit to a real quote)

Pack cost per kWh

$/kWh

Labor rate

$/hr

Labor hours

Warranty check

Years owned

Miles driven

Warranty length

Warranty mileage

Estimated replacement cost

$12,210

≈ $163/kWh, pack + labor

Battery pack: $11,250
Labor: $960
Your cost today: $0

Likely covered by warranty

A defective pack should be replaced at no cost: about 5 yr / 60,000 mi of coverage left (whichever comes first).

An estimate, not a quote. Pack prices fall over time and vary by make; edit the cost per kWh to a real quote. US EVs carry at least an 8-year / 100,000-mile battery warranty by law, many makers offer more.

Check the battery's health first

Before paying for a pack, or buying a used EV, read the state of health its battery management system reports. An OBD-II adapter plus a model-specific app (LeafSpy for a Leaf, Scan My Tesla for a Tesla, Car Scanner for many others) shows it on your phone. A Tesla also needs a separate adapter cable, and only the MX+ is listed for Scan My Tesla.

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Bluetooth Classic adapter (works with iPhone)

OBDLink MX+

Best for: Covering the most EV battery apps on iPhone or Android (Tesla needs an extra cable)

Check price on Amazon(paid link)

Bluetooth LE adapter

OBDLink CX

Best for: A Nissan Leaf or other CAN-bus EV, read from an iPhone or Android phone

Check price on Amazon(paid link)

All OBD-II adapter picks

Frequently asked questions

Out of warranty, a full pack replacement is mostly battery size × the pack cost per kWh, plus labor. At a current ballpark of around $100–$200 per kWh installed, a 75 kWh pack lands roughly in the low-to-mid teens of thousands of dollars, and a big truck pack can be more. Pack prices keep falling, so edit the cost per kWh to a real quote. Crucially, most replacements happen under warranty at no charge.

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APA: WattSimple. (2026, June 26). EV Battery Replacement Cost Calculator. https://wattsimple.com/calculators/ev-battery-replacement-cost
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Sources & standards

This tool's methodology and data follow US standards and authoritative public datasets:

EV Battery Replacement Cost Calculator

Check the battery's health first

OBDLink MX+

OBDLink CX

Frequently asked questions

Related guides

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EV Loan & Payment Calculator

EV vs Gas Cost of Ownership Calculator

EV Tax Credit Calculator

EV Lease Payment Calculator

Sources & standards

EV Battery Replacement Cost Calculator

Check the battery's health first

OBDLink MX+

OBDLink CX

Frequently asked questions

How much does it cost to replace an EV battery?

Are EV batteries covered by warranty?

How often do EV batteries actually need replacing?

Is this an exact replacement quote?

Related guides

Related calculators

EV Loan & Payment Calculator

EV vs Gas Cost of Ownership Calculator

EV Tax Credit Calculator

EV Lease Payment Calculator

Sources & standards