The largest wattage on a charger's listing may describe total output across every port. Check each port's maximum and the shared-power combinations before deciding whether it can charge several devices at their expected speeds.
Total and per-port power
Compare the maximum for one port with the total for all ports. Output may be redistributed or reduced when another device is connected.
Charging protocols
Look for the device's required standards, such as USB Power Delivery, PPS, or Quick Charge. GaN describes component technology, not a charging protocol.
Plug, cable, and device
Confirm the plug format, included cable, and device compatibility. Reaching the stated output also requires a cable and device rated for that power.
