How to open the back cover of a watch and change the battery?

1. First unscrew the four screws of the back cover with a Phillips screwdriver, and then slowly remove the screws.

2. After removing the back cover, you can see that there is a cushion rubber plate on the watch, so take it off carefully.

3. Tear off the place shown below, which is a piece of tape, and gently tear it off, as shown below.

4. Use tweezers to pry open the hidden button in the upper left corner. If the middle is positive, pry it open. Then gently take out the old battery and replace it with a new one.

5. Then prepare a U-shaped metal thing, such as the wire shown below, and short-circuit it under alternating current to restart it.

6. Then stick the tape back, cover the back cover and screw on four screws, and it will be fine.