Mistakes That Void Your Warranty

1. Non-AD battery change — opening the case at a corner shop voids most warranties instantly.
2. Aftermarket strap on a steel-bracelet model — some brands count this as modification.
3. Exceeding the WR rating — diving 50m with a 100m watch is fine; showering with a 30m watch isn't.
4. Using ultrasonic cleaners at home — can dislodge oils inside the movement.
5. Forgetting to register — many warranties require online registration within 30 days.

Keep paperwork. Use the AD. Read the fine print.