Watch batteries are the basic building blocks of your watch, and are used to store data and power.
Most watch batteries are around 50 mAh, and can be found in several sizes.
There are a variety of battery sizes, which can be different depending on what you need the watch to do, such as a watch that requires a high amount of power but also a high rate of charge.
Some watches will have different sizes and even different charges.
You’ll want to make sure you have a battery that’s compatible with the watch you’re using.
Below is a quick guide to the battery sizes available on various brands and models.
You can also check out our full list of battery types on the watch maker’s website.