A watch charger is a device used to charge a smartwatch, usually consisting of a small case and a built-in battery. Inside the charging compartment, there is an interface that can be matched with the watch charging interface, charging the watch by wireless charging or wired charging, charging without the need to plug the watch into the charger or connect the cable. Watch charging compartment is usually small, easy to carry, you can travel or outdoor activities convenient and fast power watch, in addition to other electronic products can also be used to charge, is a very convenient way to charge.