The Renata battery tester is a compact and user-friendly tool that quickly helps you determine whether the battery in an analog quartz watch is functioning properly. Ideal for professional watchmakers who want to avoid unnecessary case openings by confirming if a battery replacement is needed first.

This tester can check both silver oxide and lithium batteries, providing a reliable basis for diagnosing watch performance. The small and portable device measures just 42 x 103 mm, making it easy to carry in the workshop or on the go.