Purpose and versatility This electronic battery tool is a versatile testing instrument for both professionals and hobbyists in the watchmaking industry, suitable for a wide range of uses. Battery types and voltage range It tests AA, AAA, C, D, N, Button Cell, Lithium, and Camera batteries with voltages from 1.5V to 22.5V. Accurate battery capacity detecting Designed for watchmakers and technicians, it provides precise battery testing to diagnose issues and check battery conditions quickly, helping to streamline the process. Gentle and no risk design With exquisite craftsmanship, the tool is designed to avoid scratching or damaging precious watch surfaces, ensuring that valuable timepieces remain pristine during testing. Convenient voltage tester and durable housing Primarily used for testing watch batteries, it features a meter for easy reading and quick checks. The tool is made from plastic materials, ensuring durability and lasting use. Use scenarios In a professional watch to verify voltage and capacity before replacing a watch battery. At home or in a hobby setup to test common batteries (AA, AAA, C, D, N, Button Cell, Lithium) and camera batteries for quick life checks. In a service center to diagnose battery health across devices and streamline workflows.