Sensor stopped working

It’s not the battery. Same thing happened to me and the replacements also died early in the very next round I played. If you can still return them for a refund you’re in a better position than I am. 

Same thing happened to me...guessing it's a bad product if you do a little research, including this forum.  Plan to return all.

Have you changed the 2032 battery in sensor. I've been using the sensors over 18 months with no issue yet, apart from regularly having to change batteries. I also lost one of the sensors where the black cap an battery unscrewed from the white base.

Fingers crossed its only a cheap battery change. 

It may well be battery, especially if it’s a new set. They may just be stored badly. My problem seems to have vanished since changing golf bags, funnily enough …