Does your watch need new batteries? After a while, watch batteries need to be replaced. Fortunately, it is easy to replace them. Before you make a purchase, verify which batteries your watch uses. Cell batteries for watches are marked by letters and numbers. This way, you can easily find the right batteries for your watch. Check out our wide range of watch batteries for well-known brands such as Apple, Fitbit, Fossil, Hugo Boss, Seiko and Garmin.