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Automatic watch. An automatic or self-winding watch is a mechanical watch in which the mainspring is wound automatically as a result of the natural motion of the wearer to provide energy to run the watch, making manual winding unnecessary. A mechanical watch which is neither self-winding nor electrically driven is called a manual watch. Most mechanical watches manufactured today are self-winding.
Seiko kinetic watches are also self-powered quartz watches and do not require battery changes. A Seiko kinetic watch has a small mechanism on the back of the movement that spins around when you move. As it spins, it generates an electrical charge which is stored by an internal capacitor.