Quantum battery upends the rules of charging

Scientists have created the world's first quantum battery prototype, which charges faster the larger it becomes. Conventional batteries take several hours to charge laptops and all night to charge electric vehicles because larger batteries take longer to charge. However, quantum mechanics, the science governing matter at atomic and subatomic scales, defies this rule. Quantum batteries charge faster and deliver energy more efficiently due to quantum effects.

In March 2026, a team led by James Quach, a quantum science researcher at CSIRO, Australia's national science agency, unveiled their quantum battery prototype. Quach's method involves using an optical microcavity, with two tiny mirrors 100nm apart, filled with organic dye molecules and illuminated by a laser. The strong coupling between the light and molecules creates superabsorption, enhancing the battery's ability to absorb and store energy.

As the number of molecules increases (i.e., the battery grows larger), the rate at which energy can be absorbed also increases, allowing the battery to charge faster.

While quantum batteries hold promise for powering quantum devices and potentially even everyday devices like phones, their real-world viability remains a subject of debate. Conventional batteries rely on well-established electrochemical processes, but researchers are exploring quantum batteries as a potential alternative. The optical microcavity method used by Quach has the advantage of working at room temperature, unlike superconductive designs that require cryogenic temperatures.

However, the current prototype can only hold a small amount of energy for a short duration. To power conventional devices, the battery would need to store far more energy for a longer time. Quach is working on a new design that combines quantum components with classical layers to store energy for extended periods. He also plans to combine multiple microscopic quantum batteries to increase their total capacity.