Gallium-nitride (GaN) chargers shrink desktop bricks without shrinking output. But wattage on the box isn't wattage in the hand. We stress-tested ten popular bricks with a power meter to find which deliver real power, stay cool and keep every port stable.
Real Wattage Under Load
Several 100W claimants hit thermal throttling after ten minutes and dropped below 65W sustained. The top performers held rated output continuously and split power intelligently when phone plus laptop charged together.
Ports, Protocols & Safety
PD 3.1 with PPS mattered most for fast-charging newer phones and laptops. We verified over-voltage protection triggers after simulated spikes, and gave extra credit to bricks that stayed cool enough to hold comfortably.