Some time ago I got a hold of a list of what kind of batteries different sensors use. I haven't tried all of these out, but thought I'd share anyway.
- CR2032 (Xiaomi temp, Xiaomi buttons (switches), Visonic door sensor)
- CR123A (Fibaro pir, Neo Coolcam pir)
- CR1632 (Xiaomi door sensor)
- CR2450 (Xiaomi motion)
- CR14250 (Neo Coolcam door sensor)
- ER14250 (Fibaro door sensor)