Knowledge Generally the lifetime of a watch battery is between two and five years. Its longevity depends on the type of watch, its dimensions and the amount of energy required by the different functions. For example, a chronograph will have a higher energy consumption than a watch that only indicates hours, minutes and seconds.
Some watches are equipped with a battery power indicator: when the seconds-hand jumps in intervals of several seconds, it is time for the battery to be replaced.
Some special lithium-iodine batteries have a theoretical lifespan of up to 10 years.
