The Counterintuitive Discovery

Everyone knows the rule: the bigger the battery, the longer it takes to charge. A smartphone might need an hour, while an electric vehicle typically requires hours or even overnight. It's common sense.

Scientists at Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO), working with the University of Melbourne and RMIT University, have demonstrated a prototype that flips this principle entirely. Their quantum battery charges faster as it gets larger.

“But in the quantum world, common sense doesn't apply.”

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"Our findings confirm a fundamental quantum effect that's completely counterintuitive: quantum batteries charge faster as they get larger. Today's batteries don't function like that," said James Quach, the quantum science leader at CSIRO who led the team.

The findings, published in the journal Light: Science & Applications in March 2026, represent a decisive step forward in quantum battery research.

How It Works: The Science of Superabsorption

The secret lies in a quantum phenomenon called superabsorption. In a conventional battery, molecules act independently—each absorbing energy at its own rate. But when quantum effects take over, they begin acting collectively.

Quach's team built their prototype using an optical microcavity — two tiny mirrors positioned just 100 nanometers apart, roughly a thousand times thinner than a human hair. They filled this microscopic gap with organic dye molecules and fired a laser into it.

The light and molecules became strongly coupled, forming hybrid light-matter states. In this configuration, the molecules stopped acting as individuals and began working in unison. "So that the rate at which you can absorb energy increases with the number of molecules there are," Quach explained to the BBC.

The mathematics are striking: if a quantum battery has N units and each charges individually in one second, the collective quantum effect allows all N units to charge in just 1/√N seconds. Double the battery size, and charging time drops by more than half.

A Milestone Achievement

This isn't the team's first quantum battery. In 2022, they demonstrated fast charging through superabsorption but couldn't extract the stored energy—the battery was essentially a one-way system.

The March 2026 breakthrough solved that problem. For the first time, the researchers successfully extracted an electrical current from the prototype, completing the full battery cycle: charge, store, and discharge.

The prototype charges in femtoseconds (quadrillionths of a second) and retains the stored energy for nanoseconds — about six orders of magnitude longer than the charging time. To put that in perspective, Quach noted that if a conventional battery took one minute to charge, this quantum version would hold its charge for several years.

Why It Matters

Room Temperature Operation
One major advantage sets this design apart from competing approaches. While other quantum battery concepts rely on superconducting materials that require extreme cooling below -150°C, the CSIRO prototype operates at room temperature. This makes it far more practical for real-world applications.

Wireless Charging
The battery charges wirelessly via laser pulses, opening intriguing possibilities for remote power delivery. Quach envisions "a future where we can charge electric cars much faster than petrol cars, or charge devices over long distances wirelessly".

Quantum Computing Applications
Most experts agree the first practical use will likely be in quantum computing, not smartphones or cars. Quantum computers require precisely controlled energy delivery that matches their quantum states, and a quantum battery could provide exactly that—potentially reducing energy consumption while making quantum systems faster and more stable.

The Challenges Ahead

Despite the excitement, significant hurdles remain. The prototype currently stores only a tiny amount of energy — a few billion electron-volts, not nearly enough to power any practical device. Its retention time of nanoseconds is far too brief for everyday applications.

"The next step for quantum batteries right now is extending their energy storage time. If we can overcome that hurdle, we'd be that bit closer to commercially viable quantum batteries," Quach said.

Some scientists remain skeptical that quantum batteries will ever replace conventional power sources in everyday life. "The key point is that quantum batteries are not about storing a great amount of energy, but about delivering it faster and with greater control," noted Dario Ferraro, associate professor of physics at the University of Genova.

The team is exploring hybrid designs that combine quantum components for rapid charging with conventional storage layers capable of holding energy for longer periods. Others are investigating ways to bundle large numbers of quantum batteries together to increase overall capacity.

What This Means for the Future

First proposed in 2013, quantum batteries have moved from theoretical curiosity to working prototype in just over a decade. The CSIRO team's achievement demonstrates that quantum energy storage isn't just a physicist's thought experiment—it's a tangible technology with a clear development path.

"The research validates the exciting potential of quantum batteries for unprecedented efficient and rapid energy storage," Quach said.

How soon might we see practical applications? Not in the immediate future. The challenges of scaling up capacity and extending storage time are substantial. But the fundamental principle has been proven: in the quantum realm, bigger truly can be faster.

As one researcher put it, this is "a decisive step forward in the development of quantum battery technologies". Whether that step leads to quantum-powered smartphones, instantaneous EV charging, or something we haven't yet imagined, the journey has only just begun.