Xiaomi JY-GZ-01AQ smoke detector battery status

Hi all.

I got a Xiaomi JY-GZ-01AQ smoke detector a few weeks ago. It started beeping indicating that the battery was low, even if it is brand new, so I changed the battery to a fresh one. Still, the battery status in HA is 0%, and the detector beeps indicating that the battery is low.

I updated the FW following this guide:

Using a FW file from:

I’ve tried re-adding the smoke detector.

Has anyone else encountered this? Or know of any fix?

Same issue for me, did you find a solution?

Yes, I got a new one on warranty and the new one is fine.