I received this error when I try to charge my iphone 16 with my power bank, Cannot use accessory: this accessory use too much power
[Re-Titled by Moderator]
Original Title: Tried to charge iphone 16 with Power bank :Cannot use accessory: this accessory use too much power
iPhone 16, iOS 18
Connect the charging cable to your PowerBank first - and then connect the charging cable to your iPhone.
When using USB-C PD (Power Delivery), the sequence of connections determines the direction of charge flow. As described, in connecting the iPhone first, the iPhone was attempting to charge the PowerBank - and not the PowerBank charge the iPhone.
Bi-directional charging is by no means a universal feature of USB-C.
However, where both connecting devices support USB PD bi-directional charging - and have a rechargeable battery (e.g. a PowerBank) - this can lead to unexpected discharge of a device instead of receiving charge from the expected power source.
When connecting to a regular USB-C Power Source that does not include a battery, USB PD merely negotiates the most appropriate power profile supported by the connected devices - and charging operates in an easily predictable manner. Where both devices support bi-directional charging, the sequence of wired connection matters; until encountered and understood, bi-directional charging over USB-C can lead to some unexpected surprises.
Can you charge your iPhone with a regular USB-C Power Adapter?
This (and similar) primers may be informative as to how USB-C and USB PD operate:
https://www.chargebox.com/device-smartphone-charging-usb-cable-power-2/
https://www.anker.com/blogs/chargers/what-is-power-delivery
Hello!
Can we get a screenshot of the error message? Thank you.
Interesting!
👍 Thank you sir. Didn’t know about this.
I get the same error with that sequence
iPhone 16 charging error with power bank
