Is there a rubber gasket inside battery cover

swiss army batt 20110106 1810

Your watch is a solar powered watch and normally you don't need battery change .Nevertheless,if (as it is an old Casio model),you are convinced that battery is the cause of your problems,then replace.
1) You have to be absolutely sure that you are able to carry out the procedure.
2) IMPORTANT!! Pse note that the specific battery IS NOT an ordinary battery as it is rechargeable.DO NOT TRY TO REPLACE WITH AN ORDINARY ONE.RISK OF EXPLOSION on your wrist.+total damage of the watch.New battery has to be exactly the same with the old one (ID.code).Can be ordered on E-Bay,I suppose.
3)TOOLS:Watchmakers screw drivers + philips small size screw driver (for backcover screws) + watchmaker tweezers + 2 finger rubber gloves.
Turn the watch upside down and carefully remove the four screws (try not to loose them).Remove the strap if needed.Gently remove the back cover.Pay attention as there must be 1 or 2 tiny springs embeded on the mechanism.Keep them in place and try not to loose them.You have to remove the plastic cover (pay extreme caution to the spring/s) in order to have access to the battery.Unlatch and remove (if needed) the battery holder ( if can be removed-remember the position to put it back correctly).Take out the battery and check for possible leaks.Check the battery compartment cleaness.DO NOT TOUCH WITH BARE FINGERTIPS THE CONTACTS OF THE BATTERY COMPARTMENT.DO NOT TOUCH THE NEW BATTERY ON BOTH SIDES WITH BARE FINGERTIPS.Use the finger gloves.Put the new battery in place (do not force) and secure back the battery lamina holder.There is a AC(All clear-reset) contact on the mechanism.Using the tweezers touch one end on this contact and the other to the metallic body of the mechanism.Lift the watch very carefully(as it is,upside down-without disturbing spring/s) and check if display is activated.By paying much caution put back the plastic cover correctly in position PAYING CAUTION TO THE SPRING/S. Clean up the back cover,gasket,and gasket furrow from dirt as good as possible.Check the gasket condition.Replace if needed.Apply a little amount of special gasket silicon compound all around the gasket,both sides.Put the gasket in place.Put back gently the back cover and screws in position.MAKE SURE TO POSITION THE BACK COVER CORRECTLY(in place and not upside down).Press it gently when in correct position before you screw.CHECK ALL AROUND FOR CORRECT CONTACT. DO NOT SCREW TOO TIGHT,DO NOT FORCE.Screw with fingertips until you meet resistance.
I hope this will help.
BRegards

battery dead. take off back cover.clip inside needs small sc rew driver or push pin. to open it.tweeswers pull out . put in new one same number. grease gasket and rest. may need to reset inside. ac / point inside movement to top of battery for 4- 5 secs.tweesers

I like these little RC IR watches. They're great fun!!! For this tutorial, you will need....

• A small Phillips heads screw driver
• A pin (or needle)
• A replacement CR2032 battery

Instructions :

1. Remove the 4 screws from the back of the watch
2. Carefully remove the back plate, do not damage the delicate rubber seal
3. Carefully remove the delicate rubber seal
4. Use the pin to remove the small rubber block from the battery cover clasp.
5. The pin should then be inserted in the gap of the white plastic lug, where the rubber block was removed.
6. Use the pin to gently pull back the clasp of the battery cover.
7. The battery cover will then open with a 5mm gap approx. It does not need to be removed.
   
8. Use the screwdriver to remove the battery.
9. After the battery has been replaced, just follow the instructions backwards.

I hope this little tutorial has helped.

Normally gasket has not to be replaced after battery change.But all depends of the use.For example if you wear the watch in salt or pool water and never flash it with fresh, clean water after,it may be a cause of gasket wear.Remove the back cover.Replace all 4 batteries(be sure first that you can do this with extreme caution as all parts are tiny).Remove gasket.Check gasket condition(cracks,gasket too dry and hard).If gasket OK, apply a small amount of special silicon compound for watch gaskets,all around and to all sides of the gasket,put it back in place,carefully.Be sure that gasket is set correctly all around.Put the back cover in place and screw with much caution (not too tight-a little resistance).Your watch now normally is water resistant.But if you want to be 100% sure,take the watch to a serious repair center where it will be tested under pressure ( 3 Atm average).Then they will tell you if your watch is 100% water resistant.

mcdevito 75 here, Usually 50--100 meters of water resistance on brand new watches. However after a battery change, unless you also change the gasket (rubber ring) on the cover, you could loose all water resistance capability.

The rubber gasket is a water seal and should be trapped between the back and the case. There may be a small rim on the case to locate the gasket.

If you don't have a watch repair kit, a small flathead screwdriver or even a butter knife would work. Set the watch face down on a soft material (pillow/towel). Insert the flat tool in the gap between the back and the watch itself. Apply a bit a of pressure the loosen and remove the back. Remove the rubber gasket covering the battery. Then you will want to remove the clip covering the battery (with the flat tool). Once the clip is removed flip it upside down and let the battery fall out

It either sets into a small groove on the back of the watch or it simply goes on the back cover and seats against the back of the watch when you re-install the cover to form a gasket to water proof the watch

Yes, definetely thru that rubber gasket, otherwise there will be no contact and no sound respectively.