Imagine a smartwatch that never needs charging—thanks to a new elastic polymer that turns your body heat and movement into electricity. This breakthrough from Peking University could mean wearables that power themselves just by being worn. But will this tech truly make batteries obsolete, or are there hidden trade-offs in efficiency and comfort? Would you trust your health data to a device powered by your own energy? Let’s debate! #Tech #WearableTech #Smartwatch