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Smoke alarm (optical) from #AliExpress failed the smoke test. It feeps loudly when pushing the test button, but when held into some nice fire smoke, it does exactly nothing, despite patience.
So always test with a real life scenario. The test button only checks the batteries and the beeper are working, not the actual sensor.
I sent them a nice video and expect a refund. This isn't because it's from China, the same can happen with any.
@yngmar thank you I recently found out that some rule changed with HUD or maybe with NH rental standards and now they have to install a smoke detector inside my bedroom.
I would never buy a smoke detector from AliExpress or Temu or whatever, but my landlord might. I’ll make sure I test whatever they install.
@maggiejk No matter where you buy it, test if it works :)