Symptoms
- Second hand stopped or jumps every few seconds instead of ticking smoothly
- Digital display dim, blank, or shows a low-battery icon
- Watch worked fine, then suddenly stopped
- New battery drains again within days
Likely causes
- CommonBattery reached the end of its normal lifeWatch batteries typically last one to three years depending on type and features.
- PossibleWatch left in a drawer with the crown pulled out (some models)A crown left out can continuously drain power on certain watches.
- PossibleCorroded battery contactsA battery that leaked slightly can corrode the contacts and prevent power flow.
- Less commonFaulty movement drawing excess currentAn internal fault can drain even a fresh battery quickly.
What to do
- Note the watch brand and model, since some batteries are unusually shaped or hard to source.
- If you're comfortable opening it, use a case-back opener or a thin tool to pry off a snap-back case (screw-back cases need a special wrench).
- Note the battery's exact number printed on it before removing, and buy the identical replacement.
- Clean any visible corrosion off the contacts gently with a cotton swab and a little rubbing alcohol.
- Insert the new battery with the correct polarity (matching how the old one sat) and snap or screw the case back on firmly.
- If the watch is water resistant and you want that seal preserved, have a jeweler replace the battery and pressure-test the seal instead.
Tools and parts
- Case back opener or thin tool
- Cotton swabs
- Rubbing alcohol
Watch battery (matching number)Search: “watch battery replacement [number from old battery]”
When to call a pro
For water-resistant or higher-value watches, a jeweler can replace the battery and reseal the case properly.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.