I don't know the model of this smoke detector, but it's beeping from low battery and needs to be changed. I can't figure out how to open it, so hoping someone can help! Here are some photos of it:

First photo Second photo Third photo

If it helps, it's in Australia.


  • Things attempted: tried pushing, pulling, lifting the switch, sliding the switch - the switch won't move. Commented May 20, 2018 at 2:52
  • Have you tried twisting? Commented May 20, 2018 at 3:13
  • @AloysiusDefenestrate Yes Commented May 20, 2018 at 3:31
  • the latch must be stuck (3rd picture)
    – jsotola
    Commented May 20, 2018 at 3:44
  • 1
    This model appears to be on a hinge so i don’t think twisting will work. It seems obvious from the pictures that the latch with the arrow is meant to push counter clockwise and the main body will swing down on the hinge. Must be stuck, in which case get a bigger hammer.
    – user76730
    Commented May 20, 2018 at 5:46

1 Answer 1


It appears to have a hinge on one side and a locking tab opposite. Press it in the direction of the arrow until it moves, then swing the cover downward.


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