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marcosscrivenyesterday at 10:01 PM1 replyview on HN

I haven’t yet worked out why cheap 100W PD cables partially fail after about 6 months.

They can still provide some power, but between a MacBook and official Apple power supply, they’ll keep flicking between charging and not charging.


Replies

bennysaurusyesterday at 10:54 PM

Likely the emarker chip in the cable is reporting higher power capabilities than the cable can support long term. It'll work initially but then can't maintain that after resistance in the wires increase with wear.