What Are Watch Batteries 335? A Practical Guide for Buyers and Businesses

If a watch stops working, the battery is often the first thing people suspect. The tricky part comes when you actually open the watch and see a tiny metal cell with a number that means very little unless you know how to interpret it. That’s where Watch Batteries 335 come in. So, what are watch batteries 335? The 335 is a silver oxide watch battery commonly identified by the SR512SW designation. MicroBattery lists the 335 as a 1.55V battery with a compact profile of approximately 5.8 mm in diameter and 1.2 mm in height. Those numbers matter more than the battery\'s appearance. Plenty of button cells look almost interchangeable, but a difference of a fraction of a millimeter can matter inside a tightly designed watch compartment. For consumers, the goal is finding the correct replacement. For watch repairers and resellers, the challenge is keeping the right battery in stock without tying up money in slow-moving inventory.