Watch Batteries 303: What to Check Before You Buy

A watch that suddenly stops can make a surprisingly small battery feel like a big problem. The frustrating part isn\'t usually finding a button cell. It\'s finding the right one. Walk into a store or search online and you\'ll quickly encounter numbers such as 303, 357, SR44SW, SR44W, V303, and other cross-reference designations. They may look interchangeable at first glance, but the details matter when you\'re dealing with a precision device. For anyone looking to purchase Watch Batteries 303, the 303 is a silver oxide cell commonly associated with the SR44 family. MicroBattery\'s reference page specifies the 303 at approximately 11.6 mm in diameter, 5.4 mm in height, and 1.55V. The company\'s current 303 category includes products from manufacturers such as Duracell, Energizer, Renata, and Sony/Murata. That gives you a starting point. The more useful question is: how do you know you\'re buying the right 303 for the job?