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.
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
If you'd like to see more vintage tool evaluations, watch restorations and buying guides, let me know in the comments.
━━━━━━━━━━━━━━━━━━━━━━
📌 THE GEAR I USE
NOTE: All opinions expressed on this channel are my own. As an Amazon Associate, I earn from qualifying purchases at no additional cost to you. If you choose to purchase through my Amazon Storefront (
https://www.amazon.com/shop/bobwalder) or affiliate links, you help support the channel and enable me to continue researching, testing, and producing independent videos. Thank you for your support.
Below are curated lists of tools, equipment and accessories that I personally own, use regularly, and which have earned a permanent place in my workshop:
Many of these items have been reviewed elsewhere on this channel.
━━━━━━━━━━━━━━━━━━━━━━
📚 More from me:
#watchmaking #watchrepair #horology #vintagewatches #pocketwatches #wristwatches #QD20 #watchtools #demagnetizer