Watch Battery Stoppers 0.90mm Black Pack Of 100 - MS090
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Watch Battery Stoppers 0.90mm Black Pack Of 100 - MS060
Watch stoppers are used to extend the life of the watch battery in a quartz watches. Pulling out the crown will extend the life of the watch battery, but doing this without putting a watch stopper in between the case and the crown will not guarantee the watch crown or button will stay out. It could be knocked while in storage and the watch will start running again, therefore not saving or extending the life of the battery. Inserting a watch stopper will prevent this from happening.