Quantum batteries defy charging rules by charging faster as they grow
Scientists at CSIRO have unveiled the world’s first working quantum battery prototype that charges faster as its size increases due to a quantum effect called superabsorption inside an optical microcavity. The setup enables femtosecond charging and nanosecond energy storage at room temperature, offering a proof of concept that quantum devices could be powered more efficiently—and perhaps someday energize everyday gadgets. However, the energy stored today is tiny, and challenges like decoherence and energy extraction remain, leaving the path to practical, large-scale use uncertain and likely focused on quantum computing first.