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How to Choose the Right Battery for Your Watch

If you have a Swatch wristwatch that needs a battery replacement, you might be wondering what kind of battery to use. There are different types of batteries for different watches, and using the wrong one could affect the performance or lifespan of your watch.

One way to find out the correct battery for your watch is to look at the old battery that you removed from the watch. It should have a number on it, such as SR 936 SW or SR 927 SW. This number indicates the size and type of the battery.

 

SR936SW vs SR927SW

The first two digits of the number represent the diameter of the battery in millimetres. For example, SR 9xx batteries have a diameter of 9.5 mm. The last two digits represent the height of the battery in tenths of a millimetre. For example, SR xx36 batteries have a height of 3.6 mm.

The letter S stands for silver oxide, which is the material used in most watch batteries. The letter R stands for round shape. The letter W stands for high drain, which means the battery can handle more power consumption from the watch. Whereas SW stands for low drain, which means the battery can handle low power consumption from the watch.

So, what is the difference between SR 936 SW and SR 927 SW batteries? The main difference is the height: SR 936 SW is 0.9 mm taller than SR 927 SW. This means that SR 936 SW might not fit in some watches that are designed for SR 927 SW. However, some watches have a spring inside the battery case that can adjust to different heights, so SR 927 SW might still work in some watches that are designed for SR 936 SW.

Another difference is the capacity: SR 936 SW has a capacity of 71 mAh (milliampere hours), while SR 927 SW has a capacity of 57 or 60 mAh. This means that SR 936 SW can last longer than SR 927 SW before it needs to be replaced.

Therefore, if you want to replace your watch battery, you should check the old battery number and look for a new battery with the same number. If you cannot find the exact match, you can try a battery with a similar number, but make sure it fits in your watch and has enough capacity for your watch’s power consumption.

I hope this article helps you choose the right battery for your watch. 😊

 

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