USB-C power delivery — reading the numbers on a cheap charger
A listing saying "100W" is making a claim about one specific voltage. Whether your device gets 100 W depends on figures further down the page.
Guides
What the specifications actually mean, and which of them decide whether a product is right for you. Written to be read before you start comparing listings.
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US import duties on AliExpress orders — what changed
The de minimis exemption that let low-value parcels enter the US duty-free ended in 2025. Here is what that means for the price you actually pay.
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When a component listing does not match the datasheet
Relabelled and out-of-spec parts are a real problem in cheap electronics. Which categories it affects, and how to buy around it.