The 100W label only applies to one port at a time

The ProMaster GaN USB Charger 3-Port 100 Watt can deliver 100W from either USB-C port when that port is used alone. That single-port figure is the one to check against your most power-hungry device, usually a laptop or a camera that charges over USB-C. The moment you add a second or third device, the charger shifts into a shared-power mode, and the numbers on the side of the unit become the real planning tool.

If your camera kit includes a high-wattage laptop and several smaller devices, decide which device needs the fast charge and which can wait. The charger’s printed output chart is there to make that call before you plug anything in.

Output combinations that shape a camera-kit plan

  • ProMaster GaN USB Charger 3-Port 100 Watt: USB-C1 or C2 alone: 100W max; USB-A alone: 30W max. A single USB-C port can carry the full 100W for a laptop or a demanding camera-charging setup, while the USB-A port tops out at 30W for phones and accessories.

    ProMaster GaN USB Charger 3-Port 100 Watt

    ProMaster GaN USB Charger 3-Port 100 Watt

  • ProMaster GaN USB Charger 3-Port 100 Watt: USB-C1 + C2: 65W + 30W; USB-C1 + A: 65W + 30W; USB-C1 + C2 + A: 65W + 10.5W + 10.5W. Adding a second device changes the split. With two ports in use, one USB-C port can still receive 65W, but the third device in a three-port setup drops to 10.5W, which suits overnight charging rather than a quick top-up.

Match the port plan to the devices you actually carry

For travel photography, the useful question is not “how many ports?” but “which device gets the 65W when I share?” The charger’s two USB-C ports support Power Delivery, and the USB-A port is best treated as a lower-power slot for a phone, a small accessory, or a device that charges slowly overnight.

The charger can power cameras, laptops, phones, and tablets, but the supplied information does not list specific camera models, required charging cables, or whether every camera can charge over USB-C. Check your camera’s own documentation for its charging method and wattage before relying on this charger for camera batteries.

Travel and safety details that matter in a bag

  • ProMaster GaN USB Charger 3-Port 100 Watt: Input: AC 100–240 V ~ 50–60 Hz; folding prongs; compact GaN body. The wide voltage range means the charger is ready for many countries with the proper adapter, and the folding prongs make it easier to pack without snagging cables.
  • ProMaster GaN USB Charger 3-Port 100 Watt: The charger automatically detects your device and cable and reduces output if they cannot handle the full wattage. This is a safety and compatibility behavior, not a guarantee that every device will charge at its maximum rate. Use cables rated for the wattage you expect.

A simple way to choose before you buy

  • You often charge a laptop and a camera on the same trip: Plan to give the laptop one USB-C port and accept that the second USB-C port may drop to 30W when both are active. The three-port split is best for overnight charging of phones and small accessories.
  • You want one charger for a phone, tablet, and camera: The two USB-C ports plus one USB-A port cover three devices, but the 10.5W share in a three-port setup is slow. Use it for devices that can charge while you sleep rather than for a fast turnaround.
  • You need the full 100W for one device: Use a single USB-C port and leave the others empty. The 100W maximum is a single-port figure, not a combined total.
  • You are unsure whether your camera charges over USB-C: The supplied information does not confirm camera-model compatibility or required cables. Check your camera manual first; this charger is not a substitute for a dedicated camera battery charger unless your camera supports USB charging.

What the listing does not confirm

The ProMaster GaN USB Charger 3-Port 100 Watt record does not list a specific set of supported camera models, a required cable type for each port, or charging times for camera batteries. It also does not confirm whether every device will negotiate the highest available wattage. Those details depend on your device and cable, so treat the output chart as the reliable guide and verify device-specific charging in your own manuals.

At USD 30.47 against a catalog comparison price of USD 49.95, the charger is a compact three-port option for a mixed camera kit. The honest trade-off is that its highest output is reserved for one port at a time, so it rewards a planned charging order rather than plugging everything in at once.