Question about Casio F91W-1 Wrist Watch
For Casio F-91W how do I replace battery? I see 4 screws - do I remove screws to access battery?
Most of these resin-case F-series Casio sport watches use a fairly large lithium coin cell battery. Once the four screws holding the watch back are removed, you should be able to just pop off the stainless steel spring clip that holds the cell in place and pull it out, without having to remove any more screws. Be careful when replacing the clip, because it is asymmetrical and goes in only one way. Also be careful not to lose the tiny spring contact that connects the watch movement to the piezoelectric sound element glued to the watch back. If you lose the spring, the watch will still run, but the alarm won't sound anymore.
Posted on Sep 01, 2009
Yes you need to remove the 4 screws, an eyeglass repair kit works great, but take them out and you should see the battery. there will probably be 1 more screw to remove battery
Posted on May 11, 2009
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Posted on Jan 02, 2017
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To download a PDF file, enter the four-digit (or three-digit) module number marked on the back cover of your watch.
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