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79Metallic glass-fibre fabrics (MGFs) In wearable electronics, you have to wear a battery pack to power the electric circuit. Of course, no one wants to wear something heavy and bulky. That is why researchers are constantly looking for ways to reduce the weight of rechargeable batteries, enabling them to store more energy with less weight. This goal also applies to the textile-based lithium-ion battery developed by Prof. Zheng%u2019s team. Recently, the team has made its flexible battery lighter and more powerful by using conductive metallic glass-fibre fabrics (MGFs). In traditional batteries, a current collector connects the electrode to the external circuit. This current collector takes up much of the weight of a battery but does not itself store energy. The team thus came up with the idea of replacing typical copper or aluminium current collectors with MGFs that weigh up to 60% less. With their electrochemical stability, low sheet resistance, mechanical strength and fire resistance, MGFs are excellent choices for the flexible batteries of the future.POWER THAT BENDS