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I recently found a Huawei-branded power bank that outputs 9V over USB-A. See https://www.aliexpress.com/item/4000209696496.html https://www.aliexpress.com/item/

by kccqzy 3y ago

I recently found a Huawei-branded power bank that outputs 9V over USB-A. See https://www.aliexpress.com/item/4000209696496.html https://www.aliexpress.com/item/4000209696496.html and look at the label on the seventh picture. EDIT: I may be wrong. Apparently this is now allowed by the Quick Charge spec. See comments below.

mciancia 3y ago
That might be within some quickcharge specs and it won't output 9v by default
- notRobot 3y ago
  Yes, I can confirm those are standard quickcharge specs.
chedabob 3y ago
That looks like a proprietary version of Quick Charge, which has a negotiation step before the alternate voltage is enabled. From that murky period where everyone was tacking on all sorts of protocols to get more than 5V/0.5A from a USB-A port.
deleted 3y ago
[deleted]
justsomehnguy 3y ago
Yes, it's clearly marked as 5v/9v, so it is capable of 9V, not the only one voltage.