Batteries
125 products
Frequently Asked Questions
How do I know what battery my watch needs?▾
Check the markings on your current battery (e.g., SR626SW, 377, CR2032), or look up your watch model in a battery cross-reference guide. The case back of many watches also lists the battery type. Common sizes: 377/SR626SW (most popular), 371/SR920SW, 364/SR621SW, and 394/SR936SW.
What’s the difference between Renata and generic batteries?▾
Renata batteries are Swiss-made with consistent voltage output and a 5+ year shelf life. Generic batteries may have lower initial voltage (causing your watch to run slow) and shorter shelf life. For professional watchmakers doing customer work, Renata is the industry standard because reliability matters when your name is on the repair.
Can I replace a watch battery myself?▾
Yes! Most quartz watch batteries can be replaced at home with a case back opener, plastic tweezers (to avoid shorting the battery), and the correct replacement cell. The process takes 5 minutes once you have the right tools. Just be careful not to touch the movement with bare fingers — skin oils can cause corrosion.