The time the watch will run from being fully charged. For mechanical watches it is usually 44 hours. For quartz watches it can vary from 18 months to 10 years.
The time the watch will run with a fully charged power supply. For mechanical watches it is usually 44 hours. For quartz watches it can vary from 18 moths to 10 years.
In its purest sense, used to refer to how long a watch will run once fully wound. Thus a watch with a power reserve of 48 hours should run for that period. Often used to describe a watch which has a power reserve indicator on the dial (usually a small pointer hand and a relevant scale).
The time a watch will continue running based on the movement's residual winding of its mainspring.
Duration (in hours) of the residual functioning autonomy of a movement after it has reached the winding peak. The duration value is displayed by an instantaneous indicator: analog (hand on a sector) or digital (through a window). The related mechanism is made up of a series of gears linking the winding barrel and hand. Recently, specific modules were introduced which may be combined with the most popular movements.
The amount of energy maintained in a wristwatch if it is fully rewound once every 24 hours.
A measure of the amount of time a watch will run after being fully powered or wound, with no additional power input. Normally, this means when a mechanical watch is fully wound or a quartz watch has a brand new battery. Many modern mechanical watches have a power reserve of 40 hours. Power reserve also applies to battery-less quartz watches, which may have power reserves from 40 hours to 6 months. On battery-operated quartz watches, the term is sometimes used to refer to the expected battery life--typically 12 to 32 months.
Power Reserve Indicator - originally called - is a function of the watch, which is meant to show how long the watch is going to work until the next winding. In its essence, the power reserve indicator shows how tense the mainspring is at the moment.
