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Devices that consider themselves special enough to deserve a specific fast charge technology can't be expected to charge on just about any USB A, what's complic
by usrusr 3y ago
Devices that consider themselves special enough to deserve a specific fast charge technology can't be expected to charge on just about any USB A, what's complicated about that?
Your Sennheiser will fill up just fine in a pinch on the iPad's charger or on the M1 charger. Will the iPad charge on the charger for the M1? Likely, unless Apple sells noncompliant PD chargers or if the iPad uses some oddball fastcharge alternative that isn't PD. PD is carefully specced as a pyramid of "bigger sources can serve all lower level sinks and not just a subset" (yes, cables need to encode their level)
- hedora 3y agoAs an end user with unlabeled cables, chargers and devices, that encoding may as well not exist. I have 10 chargers, 10 cables and 10 devices. It could be that only one charger and one cable provides the highest level, so now I have to try 100 permutations to charge something. Also, many cables get flaky after a month or so, so I might have to try the winning combination multiple times. Finally, having the cables form a compatibility hierarchy is some strange theoretical property. We could have every device come with a cable that is mutually incompatible, but have one special cable that works with all devices in a vault at nist next to the standard kilogram, and then we would have a pyramid of compatibility. For instance, I’ve encountered situations where I need two different USB-C cables if I want video out to HDMI to work on two different laptops.