The BT189 Battery Tester is a versatile, no-power-required device that helps you quickly determine the charge status of various battery types. Ideal for home and professional use, it ensures you only discard fully depleted batteries, helping you save money and reduce waste. With a durable build and a reliable design, this tester provides an easy way to check the performance of your batteries before use. Main Features No batteries required for operation Compatible with a wide range of battery types: Button cells, AA, AAA, C, D, 9V, 14500, and 16340 Simple and quick battery condition check Helps reduce battery waste and saves money Allows identification of weak or dead batteries Durable construction ensures long-lasting use Proven and easy-to-use design for daily testing Specifications Model: BT189 Compatible Batteries: Button cell, AA, AAA, C, D, 9V, 14500, 16340 Power Source: Self-powered (no battery required) Build: Durable plastic construction Function: Tests battery charge level accurately and instantly