“65W fast charger” tells you the maximum the charger can supply. It does not tell you what your phone will get.
Three things have to agree
The charger, the cable and the device negotiate a speed using a shared protocol. If they do not share one, the device falls back to a slower speed.
What the terms mean
- USB Power Delivery (PD): a widely used USB-C fast-charging standard. Chargers advertise supported voltage and wattage combinations.
- PPS (Programmable Power Supply): an extension within PD that lets the voltage adjust in small steps. Some phones need it for their fastest charging mode.
- Cable rating: cables carrying more than 60 W need to be rated for it, so a 100W claim on a cable should say so.
Total versus per-port wattage
A charger with several ports often shares its total wattage between them. A “65W” charger may give 65 W from one port and much less per port when several are in use. A good listing states per-port output.
What we do
We penalise “fast charging” with no wattage or protocol stated, and we give credit when the listing names the wattage, the protocols and the per-port output. Chargers are high-risk products in our rubric.