How to open the back
BASIC WATCH BATTERY CHANGE
Get a replacement battery for your watch. Some watches have the battery information stamped on the back plate. If yours doesn't, you'll have to wait until you've removed the old battery to see what kind of replacement watch battery you'll need.
Lay your watch face down on a non-scratching, non-skid surface. It may help to clamp the watch to the surface.
Remove the back from the watch. You might be able to pry it off with your fingernail, but you'll probably need a stiff, thin tool like a knife or screwdriver. You can also buy watch repair kits, which have the perfect tools for the job. Check the watch back for a small notch to insert your tool, but not all watches have these.
Remove the battery from the watch once the back is off. You might need to tip the watch over to let the battery fall out.
Insert the new watch battery into the proper space, first double-checking its size against the old battery to make sure it will fit. Press lightly into place.
Replace the back on your watch. Make sure you press firmly to get the back seated snugly.
If this doesnt work, then take to a local jeweler/watchmaker who is equipped with the right tools to assist you.
on Aug 17, 2010