I have been working with what looks to be the same sensor. Based on the research I did, it identifies as:
model: TS0207
manufacturer: _TYZB01_sqmd19i1
I've seen it under the names Tuya, Blitzwolf, Konke, CR Smart Home. I want to make sure it stays connected, so I have been working on a driver. It's still a work in process. Tuya Blitzwolf ZigBee Leak Detector
I'm testing the same one (sold as the Ewelink brand) on ST using the built in drivers. Works fine so far. Battery life isn't as long as I would like, but they're just using a CR2032.
I agree, I just got a low battery notification this morning after only a few months. This is under the basth so a pain to replace, I think i‘ll go back to a smarthings sensor for this location it would be worth the extra cost.
A couple of things to consider. Sometimes the batteries that are included - if any are - might be old. Also, just because something reports low battery doesn’t mean it might not last for quite some time.