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Y⃒̸̷̝̜̙ͥͥͥngmar

Smoke alarm (optical) from 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.

#SmokeAlarm#FireAlarm#Detector
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Y⃒̸̷̝̜̙ͥͥͥngmar

Got refund, left 1-star warning and did the obvious, crack the thing open.

Test button works, status LED flashes and yet, never mind smoke, even shoving some tin foil inside the detector causes no alarm.

It has what looks like an IR LED and a photo diode, but the LED isn't lit. It's not even powered. Great battery life, I'm sure.

This is a complete fake that can never work. 1000+ sold, proclaims the listing. That's a lot of potentially burning to your death.

Fake smoke alarm. It's opened up, revealing the expected parts, a PCB, piezo beeper, battery clip, button, status LED and a black plastic optical smoke detector module. The module is pried open, the cap laying on the right. A wad of crumbled up tin foil is shoved in the supposed beam of (infrared) light, surely interrupting it.
PCB bottom. There's about the expected amount of components, including the main chip, which is blank with no label, something commonly found in cheap AliExpress electronics that do work. There are a lot of missing components, but the "ANT" marker on one hole implies that these are for a version with radio communications.
#Fake#AliExpress#Smoke
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