How Do Charging Ports in Backpacks Work? | It’s a Pass-Through

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Charging ports in backpacks work as pass-through USB connections, routing power from a separate power bank you supply to your device.

For the full breakdown, see our best Backpack With USB Charging Port guide.

Ever eyed a backpack’s built-in USB port and assumed the bag itself holds a battery? Most don’t. That little port is usually a pass-through connector — a clever piece of wiring that just makes your own power bank easier to use. Before you buy, it helps to know exactly what you’re getting, because a charging port alone won’t power anything.

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