Each watch has its own types of movement. Says Ishaan Mehra, General Manager-Sales & Operations, Ethos, “There are three types of movements. The first is the battery-run quartz. Then there is hand-wound, or manual watch, which gets its energy from, as the name suggests, being wound up by hand and this may even have a power reserve (that helps you store energy and power the watch for at least 24 hours or up to 48 hours, depending upon the brand). The third is an automatic watch, also known as self-winding watch, which is a mechanical timepiece in which the natural motion of the wearer provides energy to run the watch, making manual winding unnecessary.”