How do you get battery out of watch? Do I have to take out all screws and remove top piece?

Is it all digital (with a digital readout), or does it have two, or even three hands that point to the time?

Check the top around the crystal. Some of those watches came apart from the top of the watch. Generally a few screws to remove. If no screws then the back pops off. Not easy but it may be the way in.
Again, if it's a decent piece go to a jeweler to do the work. Should be under $10.00. to do it.

thank you, gabe.

Looking at pictures of the watch , you will need to remove one side of the strap by undoing the screws on the side of the strap.
once you have removed one side of the strap unscrew the four screws on the case back of the watch.
then you will be able to lift the case back of the watch , it has a rubber seal on it which you need to carefull not to break.
Good luck and be carefull.

TGXL103GRN Check inside watch where the battery holding area has a metal tab to secure it. There's always a big gap btwn the tab/batt area and where it makes keyboard contact. To fix:
1 remove screws and watch back.
2 put tiny screws in dish
3 notice battery condition/position.
4 change batt if necessary
5 fold a tiny piece of paper to fill gap
6 use tweezer to put in place (no foil, no glue)
7 to test if gap is gone, close watch
8 must screw shut + reset to test
9 be patient, adjust as needed
10 take care to not strip screws.

If you take a look at the back of the watch, look for screws holding on the back plate. If there are screws (usually, if they are there there is one in each corner -- unscrew them. If there are no screws in the back of the watch, look VERY carefully at where the backing for the watch connects to the front piece of the watch. There should be a small indentation somewhere along the rim -- use a knife or a small screwdriver in that groove and pop the watch backing off.
Once you have the back of the watch off, you will see the battery right there. Sometimes they just pop out (held in by the watch back) ... sometimes there is a small piece of metal holding it in (in which case you should try to rotate the metal piece off the battery -- don't bend it).
Once the battery is out, take it to a store that sells watch batteries and match the battery type exactly (a lot of watch batteries look the same, but you need an exact match). Put the new battery in, cover it with the metal tab (if there was one) by rotating the tab back over the battery like you found it. Put the watch backing back on (and replace the screws if there were any).
Hopefully, that will kick start your watch for you, and you should be all set :-)

Spread the towel out on a flat surface.

Remove the watchband if necessary in order to access the back of the watch.

Unscrew the back protector from the watch using the correct size miniature screw driver. Place the screws in a small pile on the towel. Be careful not to drop them as they are difficult to find.

Remove the back plate by unscrewing the small screws. There is a tiny spring on the underneath of the back plate. It may be visible, or not. Make sure not to turn the watch upside down or the spring will dislodge.

Remove the rubber protector to find the battery.

Use sharp point tweezers to remove the clasp covering the battery. There is a small hole at one end of the clasp. Insert one end of the tweezers into the hole to spring the clasp loose.

Remove the old battery with tweezers.

Insert New Battery and Reassemble Watch

Pick up the new battery using regular tweezers and put it into place. Do not touch the battery with your fingers.

Replace the clasp over the top of the new battery.

Perform a reset by touching the AC contact with one part of the tweezers and the back of the battery with the other part. Hold for a few seconds. Lift the watch carefully and look up at the front to make sure the watch is working. Do not turn the watch over.

Replace the rubber cover.

Replace the back plate by screwing the small screws back into place.

Replace the back protector by screwing the small screws back into place.

Reattach the watch band to the watch face.

Feel a bit unnerved by this? Find a local jeweler. Best regards.
Jewel

You will need to look for any screws holding down a plate over the battery. Sometimes these only need to be loosened and sometimes they have to be removed. Sometimes the plate can be lifter slightly and the battery slide out from underneath. I hope this helps you. Best luck

I haven't seen this watch but I suspect the thin metal peice is the battery retainer. If so look carefully to see if it clips over the module at provably several points. If so gently prise them up to release the retainer. Wipe off new battery and install the correct way up. Replace retainer ensure it is correctly clipped in at all points. Set about recalibration process. If it doesn't have clips perhaps it has screws. If so remove them etc. Pleae rate this solution.

Remove the four screws that hold the battery cover on the back of the watch. Remove the 3 very small screws that hold the battery in place. Remove the battery from the battery holder. The piece that the 3 small screws were removed from seperates from the 3 volt 2016 energizer battery. Replace the battery with a new one. Re-install the battery holder to the watch. There is a small tab on the lower left part of the battery holder that needs to be depressed to activate the watch. Depress it and look at the face of the watch to make sure it is activated. The watch will need to have the time, date etc reset but you should now be able to see that the battery is working. Replace the battery cover and reset the time and date as needed.

It really is best to have a professional install it, but if you would like to attempt to try it yourself, you will need certain tools. Take a small phillips-head screwdriver and remove the four screws on the back of the watch. Take off the back. Be careful not to mess up the seal (rubber round gasket). You will see a battery strap with three prongs with screws holding down your lithium battery. Unscrew any two of the three screws, and using a tweezer, pull out the battery. Put in the same number battery (probably 2016) making sure to insert it positive side up. Rescrew the screws. Next to one of the screws that you unscrewed, there will be another piece protruding off the battery strap, which almost hits the circuit board. Take your tweezers and lightly press it down to make contact and hold for 3 seconds. Replace your backing and screws.