1. Helps activate deeply discharged or idle phone batteries and restore usability. 2. Built-in LED screen clearly shows output voltage for accurate testing. 3. Compatible with various phones, batteries, chargers, and power banks. 4. Easily identify battery health issues through voltage changes. 5. No software required, suitable for beginners and professionals. 6. Small size and lightweight, perfect for repair benches or carrying. 7. Widely used in mobile phone repair, battery maintenance, and power testing.
