For years, chargers relied on silicon-based semiconductors, a reliable but limited material when it comes to heat generation and physical size at higher wattages. Gallium nitride (GaN) moves electrons far more efficiently than silicon, allowing the same power output with less heat loss on a smaller circuit.
In practice, this shows up clearly: a classic 65W silicon adapter is roughly matchbox-sized, while a GaN adapter delivering the same wattage can be noticeably smaller and runs cooler. Lower heat is not just a comfort issue, it also has a real effect on the long-term lifespan of the battery and the charging circuitry itself.
GaN also operates at higher switching frequencies, which lets manufacturers shrink coils and capacitors inside the charger. That is why chargers rated above 100W can now fit in a pocket, a genuine win for travelers or anyone trying to save space in a bag.
Charjett's GaN-based chargers follow the same design philosophy: a compact body, low heat output, and high efficiency. They tend to cost a bit more than classic adapters, but the efficiency and durability gained over years of use more than make up for the difference.