Rapid depreciation in China’s electric vehicle market is often portrayed as evidence that EVs are becoming disposable consumer electronics. Yet the opposite may prove true. While the vehicle loses value, the battery increasingly becomes a long-lived energy asset with multiple commercial lives ahead of it.

For decades, critics of electric vehicles have warned about one inevitable problem. What happens when millions of batteries reach the end of their lives? Images of mountains of discarded battery packs have become a familiar feature of debates surrounding the energy transition, reinforcing the perception that electrification simply replaces one environmental problem with another.

The emerging evidence suggests something rather different.

The battery may become the single most valuable component of the vehicle long after the vehicle itself has lost much of its economic value.

China’s EV Market Is Showing the Future

China has become the world’s largest laboratory for electric mobility. Its EV fleet is expanding so rapidly that the average electric vehicle on Chinese roads is now only around 1.8 years old, compared with more than eight years for conventional petrol vehicles. The figure reflects extraordinary sales growth rather than unusually short ownership periods, but it illustrates just how quickly new technology is entering the market.

At the same time, fierce competition between BYD, Tesla and dozens of domestic manufacturers has triggered unprecedented price wars. Used electric vehicles have depreciated far faster than many analysts expected, with some retaining little more than 40% of their original value after only three years.

To many observers, this appears to confirm the weakness of electric vehicles.

In reality, it may be exposing the weakness of looking at the vehicle as a single asset.

We Have Been Valuing the Wrong Component

Throughout automotive history the engine and the vehicle have aged together.

Once a petrol or diesel car reached a certain age, its engine, gearbox and fuel system all deteriorated simultaneously. Refurbishment was expensive, replacement rarely made economic sense, and the vehicle eventually became scrap. The powertrain had little value outside the car itself.

Electric vehicles fundamentally change this relationship.

The battery degrades far more slowly than the rest of the vehicle and, crucially, remains useful even after it no longer satisfies automotive requirements. A battery that has lost 20% of its original capacity may no longer deliver the driving range expected by consumers, but it can still provide many years of stationary electricity storage.

The vehicle becomes obsolete.

The battery often does not.

Batteries Are Becoming Independent Energy Assets

This is precisely the transition now being observed by researchers tracking the battery value chain.

According to Hans Eric Melin of Circular Energy Storage Research and Consulting, batteries entering the market today are increasingly expected to generate positive economic value throughout their entire lifetime. Rather than ending with recycling, many packs will first be refurbished, reused in other vehicles, repurposed for stationary energy storage and only recycled after several decades of productive use.

By 2035, the market for end-of-life batteries is expected to be many times larger than today, creating an entirely new industrial ecosystem around battery testing, remanufacturing, repurposing and material recovery.

The battery is gradually becoming an asset class in its own right.

Try Doing That With an Internal Combustion Engine

The comparison with conventional vehicles is revealing.

An ageing diesel engine rarely becomes more valuable over time. It cannot easily become part of a home energy system. It cannot stabilise an electricity grid. It cannot store solar power during the day for use at night. Once its automotive life ends, its remaining value is generally limited to scrap metal or spare parts.

Electric vehicle batteries follow an entirely different economic trajectory.

Even when no longer suitable for demanding automotive use, they often retain 70-80% of their original capacity. This opens opportunities for grid balancing, renewable energy integration, commercial storage, backup power and residential battery systems before valuable materials such as lithium, nickel, cobalt and copper are eventually recovered through recycling.

Instead of a linear decline towards waste, batteries increasingly follow a cascade of productive applications.

The Battery Could Soon Be Worth More Than the Car

Perhaps the most surprising implication is what this means for used vehicle economics.

As EV technology continues to improve, consumers may replace vehicles not because the battery has failed, but because newer models offer faster charging, longer range or more advanced software. The vehicle itself depreciates rapidly while the battery continues to retain significant technical and commercial value.

It is therefore entirely plausible that within the next decade a five- or seven-year-old electric vehicle could reach a point where the battery represents a substantial share of the vehicle’s remaining value. In some market segments, the battery may eventually become worth more than the rest of the vehicle combined.

That possibility would fundamentally change how used vehicles are financed, insured, traded and dismantled.

The Waste Debate Is Already Becoming Outdated

Much of today’s discussion still assumes that millions of batteries will eventually become an environmental burden.

Increasingly, that assumption appears to misunderstand the economics.

Waste generally emerges when an object has no further productive use.

Electric vehicle batteries are rapidly moving in the opposite direction. Their technical life increasingly exceeds the commercial life of the vehicle they were originally designed for. Every improvement in diagnostics, refurbishment and recycling only strengthens that economic proposition.

Ironically, one of the most criticised components of the energy transition may become one of its most valuable long-term assets.

The future of electric mobility may therefore not be defined by how long the car lasts.

It may be defined by how many different lives its battery can have.

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