Is Your Quartz Watch Dead... or Just the Battery? Biaozhun QD20 Tester Review

If your quartz watch has stopped, is it dead… or just the battery? This simple tester gives you the answer in seconds. In this video, I use the Biaozhun QD20 Quartz Watch Tester on multiple watches, and it turns out to be a surprisingly capable and affordable tool that belongs on any watch repair bench. If you work on quartz watches, this removes the guesswork. The QD20 quickly tests batteries, movements, timing, and diagnoses faults in seconds. If you’ve ever picked up a watch that’s stopped and wondered whether it needs a battery—or if the movement itself has failed—this gives you a fast, reliable answer. What I cover in this video: Accurate seconds-per-day gain/loss measurement Button cell battery testing Quartz movement operation checks Coil condition testing Fault detection and irregular behavior Whether a watch is worth repairing Why this matters: Too many people waste time swapping parts—or even entire movements—without knowing the real issue. The QD20 gives you immediate, reliable answers so you can diagnose problems properly. My verdict: For quartz work, this is essential kit—simple, fast, and extremely practical whether you’re a beginner or experienced hobbyist. UPDATE: Check out this video for a test of the "hidden" demagnetizer function:    • Does the QD20 Actually Work as a Demagneti...   CHAPTERS: 00:00 Introduction 01:00 Features 01:25 Demonstration - Seconds per day gain/loss measurement 03:25 Demonstration - quartz movement operation 05:30 Demonstration - battery testing 06:30 Demonstration - voltage testing 06:55 Demonstration - Coil condition testing 07:15 Wrap up 08:15 Verdict 👉 Watch next:    • $180 vs $8 Watch Oilers — Do You Really Ne...   👉 Avoid this mistake:    • AliExpress "Big Red" Watch Tools — Huge Mi...   • Don't Forget To Subscribe! • 👉    / @fascinatingtimemachines   PRODUCTS: NOTE: I am not sponsored in any way and not an Amazon Affiliate. All opinions are my own. 👉 Biaozhun QD20 Quartz Watch Tester: https://www.amazon.com/dp/B0FLFBG3KK https://www.aliexpress.us/item/325680... 📚 More from me: 📌 My full watch collection: https://pocketwatchdatabase.com/profi... #watchrepair #quartzwatch #watchtools