Battery powered ESP-01 smart switch

ESPHome
51

I finally found some time to test the genuine RT9080 from Digikey. To the surprise of absolutely nobody, I can now confirm that I was indeed scammed by AliExpress.

I did the exact same experiment as when I initially tested the fake components, and repeated the test for both of them today in exactly the same conditions. The results speak for themselves:

  • Genuine RT9080’s quiescent current: ~2uA
  • Fake Aliexpress RT9080’s quiescent current: ~80uA

Here’s a photo of both components, for reference:

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The real part is marked 2U=HH3, the fake one is marked 2U=J6S

And here is the listing for the fake part, do NOT buy if you’re looking for a low quiescent current part: https://de.aliexpress.com/item/1005009348334551.html

You live, you learn :slight_smile:

I still don’t know if I’ll be using them, as my ESP-01S seems to have survived fine being supplied with 4.2V and we’re now at more than 4 months of autonomy on a single charge and it’s still happily running. We’ll see.

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