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GaN Wall Chargers Explained: What Wattage Do You Need?

How to match a charger to your phone, tablet and laptop

A good wall charger matches your devices, fits your bag and works with the cable you own. This guide explains the main points.

melux ePower 10 100W wall charger with Australian and EU plugs and cable

What is a GaN charger?

GaN stands for gallium nitride, a semiconductor material. GaN chargers waste less energy as heat than traditional silicon chargers, which lets manufacturers make them smaller for the same power.

How many watts do you need?

The simplest check is the charger that came with your device and the rating printed on it. As a rough guide, phones typically charge at around 20 to 30W, tablets at around 20 to 45W and laptops at around 45 to 100W. A higher-wattage charger can power a lower-wattage device, because the device only draws what it needs.

Multi-port chargers: total versus per-port power

The total output of a multi-port charger is shared between its ports. A charger rated at 100W may deliver less on each port when several devices are plugged in. Look for the per-port ratings, not just the headline number.

Your cable matters

To get 100W from a USB-C charger you need a cable rated for 100W (5A). A cable rated for less will limit the charging speed. The melux ePower 10 includes a 100W cable.

Plugs and travel

Australian wall sockets use the Type I plug. If you travel to Europe, a charger with a swappable or additional plug saves carrying an adapter. The ePower 10 comes with Australian and EU plugs.

Check the compliance mark

Chargers sold in Australia should carry the RCM mark. Check the product page for the registration details before you buy.

The melux range

  • ePower 10: 100W output across 3 ports (2 USB-C and 1 USB-A), Australian and EU plugs, 100W cable included.
  • ePower 6: a compact dual-port charger (USB-C and USB-A) with a 1m USB-C cable included. See the product page for its output ratings.

Ordering from melux

  • Dispatch from Melbourne, normally within 2 to 3 business days.
  • 1-year warranty on our chargers and power banks.
  • 30-day change-of-mind returns for items that are unused and unopened (see our Terms and Conditions).
  • Questions? Email [email protected].
GaN Wall Chargers Explained: What Wattage Do You Need?
Sales Team 1 October 2026
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