What Is a Watch Movement Power Reserve: How to Calculate Remaining Time
Author: Funny Items
Release time: 2026-08-20 05:49:05
View number: 19
Know Your Runtime
Calculating remaining power reserve helps you know how long your watch will keep running.
Calculation Method
- Note when you last wound or wore the watch
- Check the power reserve rating e.g. 41 hours for NH35
- Calculate elapsed time since last winding
- Subtract from total power reserve
Power Reserve Ratings
| Movement | Rating | Real World |
|---|---|---|
| NH35 | 41 hours | 35-41 hours |
| NH34 | 41 hours | 35-41 hours |
| VK63 | N/A battery | 2-3 years |
Tips
- Wind fully before wearing for maximum runtime
- Wear daily to keep it wound
- Use a winder if you rotate watches