1. Test the battery and the coil
2. No need to open the watch
3. 9 volt battery

The Watch Battery Tester tests the pulse of quartz watch movement
It can be checked with movement out of watch case or inside of watch case
It has two options to check silver oxide low and high drain battery power
Additionally, this tester allows you to check the coil of the watch movement with the power conductor indicators
Very practical tool for battery and quartz movement changers