Glossary
What an automatic watch is
what is an automatic watch
An automatic watch is a mechanical watch that winds itself as you move — a rotor inside the case turns and tensions the mainspring, so you often never need a battery or a daily hand-wind.
How it works
A coiled mainspring stores energy. Gears release that energy to move the hands. In an automatic, a weighted rotor spins with wrist motion and winds the spring. Leave the watch still long enough and it stops; wear it or use a winder and it runs again.
Automatics need periodic service (often on a multi-year cycle) and will never match quartz accuracy out of the box. Many people choose them for craft, longevity, and the feel of a living mechanism.
What this means in practice
If you rotate several watches, an automatic may stop between wears — that is normal, not a defect. If you want “set it and forget it” accuracy, quartz may fit better. Neither is morally superior; they solve different briefs.
FAQ
Do automatic watches need batteries?
No. They run on a wound mainspring. Some modern pieces add a battery for quartz or hybrid modules, but a classic automatic does not.
What is power reserve on an automatic?
Power reserve is how long the watch runs when fully wound without further motion — often roughly one to three days depending on the movement.
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