How long is lifetime of my watch battery?
A battery life varies usually from two to ten years depending on the type of the watch, dimensions and capacity of the battery, the size and weight of hands, and the amount of energy required by the different functions of the movement. For instance, a chronograph will have a higher energy consumption than a watch indicating the hours and minutes only.
Some Luminox watches feature an end of life indicator: Once the second hands starts moving in 4-seconds intervals, it is time to have the battery replaced by a Luminox qualified watchmaker. However, even in the 4 seconds interval, your watch will continue to run for one to three weeks before stopping.