The compatible output of a power bank for charging or supplying power to the camera varies depending on whether your camera supports USB PD (USB Power Delivery).
If your camera supports USB PD
For fast charging, use a device that supports USB PD.
Note that the compatible outputs of the devices required to charge or supply power vary depending on the combination of your camera, charger, and other devices.
For more details, refer to the following article:
Which Sony cameras support USB PD (USB Power Delivery)?
If your camera does not support USB PD
The compatible output of a power bank for charging or supplying power to the camera is up to 1.5 A (0.5 A to 1.5 A).
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