This is the right watch accu for your Citizen watch with caliber:7870. You can find the caliber on the back of your watch. This is a rechargeable battery, also known as Eco-Drive. A long lasting battery for your Citizen watch. The Citizen 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
