Casio MarineGear wristwatch battery Replacement
Geir Ove Andersen and 3 other contributors
Last updated on May 7, 2026
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Community-Contributed Guide
An awesome member of our community made this guide. It was not created by iFixit staff.
Introduction
Go to step 1 ↓Step by step guide on how to replace the battery in the watch.
What you need
Parts
Tools
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Tool used on this step:Tweezers$4.99
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Use the tweezers to remove the plastic ring that aligns the movement.
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In this case the watch didn't have a battery installed, but to get the battery out you have to use the tweezers and unhook the latch holding the battery in place.
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The correct battery for this watch is CR2025 3V button cell.
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Insert the new battery into it's place.
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Latch the battery hook back into it's place, securing the battery.
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Turn the movement over to verify the watch is now working.
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Make sure the rubber gasket is placed correctly in it's groove, as it is there for water resistance.
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Place the back cover on and fasten the 4 Phillips #00 screws securing the back plate.
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Set the time and date, and your watch is now in working order again.
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Ask FixBot
Reassembly is detailed in the guide
