If you still carry a heavy laptop brick plus a separate phone charger, a GaN charger can replace both. Here is what the term means and what to check before you buy.
What is GaN?
GaN stands for gallium nitride, a semiconductor material that handles high voltages more efficiently than the silicon used in older chargers. Less energy is lost as heat, so the parts can be smaller and packed closer together. The result is a 65 W charger roughly the size of a classic 18 W phone plug.
What does 65 W actually mean?
The wattage on the label is the maximum the charger can deliver in total. When several devices are connected, that power is shared between the ports. On the OHMZ GaN Charger 65W, for example, the top USB-C port gives up to 65 W on its own, but with a phone and earbuds also plugged in, the laptop port drops to a lower level so everything charges safely at once.
Check what your devices need
- Phones: most fast-charge at 18–45 W over USB-C Power Delivery (PD) or PPS.
- Tablets: usually 20–45 W.
- Laptops: many thin-and-light USB-C laptops need 45–65 W; gaming laptops need far more and still use their own adapter.
- Earbuds and watches: just a few watts, so any port will do.
The cable matters too
A charger can only deliver its full power through a cable that is rated for it. Basic USB-C cables are rated for 60 W (3 A), which covers most phones and 65 W-class laptops in practice. Look for a braided jacket and solid connector housings if the cable will live in a bag, because the point where the cable meets the plug is where cheap cables usually fail.
Is it safe to leave it plugged in?
Quality chargers negotiate power with your device and only send what it asks for, and they include over-voltage, over-current and temperature protection. It is normal for a charger to feel warm when it is working hard. Keep it in a ventilated spot rather than under a pillow, and unplug it if the casing is ever damaged.
One good GaN charger and a couple of decent cables can tidy up a drawer full of old adapters - and lighten your travel bag at the same time.
