USB-B adapter cable for external USB-A power supply - reviews - There are 4 reviews.

Cable "usb" pour alimentation séparée
Cable très pratique afin de pouvoir injecter un 5 volts séparé de celui de l'ordinateur, bien fabriqué par Audiophonics.Vraiment pratique pour un DAC externe. Très Recommandé.

Simple, such as excellent solution for the separation of signal and power supply.
Very Clean process tool, increases the flexibility when using between an SMPS or battery operation.
The length is sufficient for many combinations, but should be a little longer for a personal.
Top product !

Simplest possible solution to separate power from signal, nicely made, works perfectly, delivered fast. I will shop here again. Thanks!

great product
really like this product and works perfectly; use it with an interface also bought with Audiophonics; stable supply of clean power by using a usb battery pack; Audiophonics keeps you well informed with the shipping progress and sent the items very quickly to Holland; all thumbs up!