How Power Is Shared on the USBC Ports of Your Belkin USBC Hub (AVC021)

This article explains how power is distributed across the USBC ports on your Belkin USBC hub when no external power adapter is connected. The illustration above highlights the 12W shared output behavior and what it means when charging or powering accessories.

How 12W Shared Output Works

The hub draws power only from the laptop.
The available power for accessories is 12W total, shared across all USBC data ports.
When multiple devices are connected, power is divided automatically between them.

Example:

One connected device may receive close to the full 12W.
Two or more devices will each receive less power, depending on demand.

What You Can Connect in This Setup

This setup is best for lowpower devices, such as:

USB flash drives
Keyboards and mice
Smartphones charging slowly
USBC adapters or card readers

It is not designed for fast charging of phones, tablets, or other high-power devices.

Important Charging Limitation

When using this setup:

Charging above 7.5W per USBC port is not recommended.
Connecting multiple charging devices may result in slower charging or no charging for some accessories.

This behavior is expected and helps protect the hub and connected devices.

When to Use This Setup

Use the 12W shared output configuration when you:

Need data access, not fast charging
Are traveling without a power adapter

How to Improve Charging Performance

To deliver more power:

Connect a USBC power adapter to the hub’s USBC Power Delivery (PD) port.
Use a 60W or higher charger (recommended).
This enables passthrough charging and increases available power for your laptop and accessories.