How does a mechanical watch works without having any batteries?

Question

I have my interests in watches.

In: Engineering

Answer 1

With a spring. Mechanical watches have a spring that gets wound up, thus storing energy. As it unwinds, it releases that energy through a series of gears to allow watch to tick at a steady and correct rate. As the spring unwinds, it loses energy, so you have to manually rewind it again periodically to keep it working.