Yes, although the dual 5V/9V standard seems well supported. The danger can be a dual (or more) voltage charger connected to a 5V only device and the protocol negotiation fails. Damage can be caused! Somewhat of a pain!
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I've not seen damaged from it, my understand was it should always be 5v unless there was successful negotiation. I guess the problem is mis-understood negotiation. I'm thinking the tablet might want 12v/15v or even 20v which isn't present on all chargers, even some higher current ones.
Agreed, but….. I have a portable which has its own USB-C power supply which has a 12V output. Fixed? 5V option? I don’t know so I’m not going to be plugging it into so low-cost device!
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