cellulose

Flint's paper battery is real and it doesn't need lithium

Paper is an unexpected starting point for a rechargeable battery, which is part of Flint's appeal. The Singapore-based company uses cellulose, the plant-derived material in paper, to build something that stores energy without lithium. That alone makes it worth a second look. Flint's battery is real, rechargeable, and skips the geopolitical headache of lithium mining entirely. It's the kind of quiet, weirdly elegant detail that makes you wonder why nobody thought of it sooner. It won't power your car, but it might power the disposable sensors, smart labels, or medical patches that currently rely on single-use coin cells. That matters. If you enjoyed this kind of deep curiosity about how things actually work, you should poke through our look at Logitech's surgical XR controller concept, another piece of hardware that refuses to be obvious.