This is a rechargeable battery, also known as Eco-Drive or Tough Solar. A long lasting battery for your watch. The battery has battery number: MT920 and the following specifications:
Diameter: 9.5mm
Height: 2mm
Voltage: 1.2 V
The watch case is screwed and to get it open use our tool for opening a (screwed) watch case. A non-slip ball that allows you to open the case in no time, without scratching it! Our watchmaker shows in this tutorial how the tool works.
Note: the battery is not shipped fully charged. Advice is to put the watch in a sunny/light place to charge after installing the battery.
April 7, 2025
