If the electronic watch doesn't work, it means there is no electricity. If it needs to be replaced, change a few dollars to buy an electronic one, ask the master, 10-50, depending on the place.

The mechanical watch doesn't work, there is something wrong with the internal gear, or it has been left for a long time and there is no power. A mechanical watch will have the ability to walk until it is put on your hand. Don't go without it. If the gear is broken, it is not recommended to repair it. Maintenance cost 30-500 yuan. Might as well buy a new watch. Room 903, 9th Floor, Hainan Airlines Tianjin Center Office Building, No.219 Nanjing Road, Heping District, Tianjin (the entrance of the office building is located at the intersection of Guiyang Road and Xining Road). There are two main reasons why Dumet's mechanical watch doesn't work. One is that the watch stopped because there was not enough kinetic energy. There is also a serious sludge accumulation because the watch was bumped during use or the movement was not maintained for a long time.

For mechanical watches that stop because of lack of power, it is only necessary to wind the watch manually. It is necessary to clean and maintain the watch for users who stop exercising because of sludge. Users are advised to send their watches to a professional watch repair center for oil washing and maintenance.