In today’s fast-growing digital world, tiny devices are quietly working all around us. From smartwatches on our wrists to sensors in factories and homes, these devices form what we call the Internet of Things (IoT). They collect data, monitor environments, and help make smarter decisions. But there’s one major problem—power. Most of these devices rely on traditional batteries like lithium or nickel-zinc. These batteries need frequent charging or replacement, lack flexibility, and can harm the environment. As the number of IoT devices increases rapidly, this power problem becomes even more serious. Scientists have been searching for a better, cleaner, and more reliable solution. Now, a team led by Dan-Liang Wen has developed an exciting new technology that could change everything—a self-powered system that doesn’t need batteries at all. A New Way to Generate Power The breakthrough comes in the form of a triboelectric-electromagnetic hybrid nanogenerator (TEHNG) . While the name may soun...