Indicates remaining power before watch stops running.

A feature of a mechanical watch that shows how much longer the watch will operate before it must be wound again.

An aperture or subdial on mechanical watches that shows how much longer the watch will operate before requiring winding.

This feature indicates when the power resource of a mechanical movement watch is low & soon the watch will need winding.

a counter on the dial of mechanical watches showing the remaining time before the movement has to be wound again.

A feature that shows when the watch will soon need a new battery or winding . A battery reserve indicator on a quartz watch informs the wearer when the battery is low. Often this is indicated by the seconds hand moving at two or three-second intervals. Seiko's Kinetic watches are quartz watches that do not have a battery (see Kinetic ). When a Seiko Kinetic needs to be wound, the seconds hand will also move in two-second intervals.