Q: What exactly is a GaN charger, and why is it smaller than the brick that came with my laptop?
A: GaN stands for gallium nitride, a semiconductor material used inside the charger instead of traditional silicon. GaN can switch electrical current on and off much faster and tolerate higher temperatures, so the charger needs smaller transformers, capacitors, and heat sinks. That is why a 65-watt GaN charger can be roughly the size of a deck of cards while an older 65-watt laptop brick feels like a paperweight. The charger still performs the same basic job: it converts wall AC power into the DC power your device needs, and it negotiates the right voltage and current over USB-C Power Delivery. GaN is not a new charging standard, and it does not unlock secret speeds. It is mainly an engineering improvement that lets manufacturers build smaller, cooler, and often lighter power adapters.

Q: Will a GaN charger charge my laptop or phone faster?
A: Not by itself. Charging speed depends on the device, the charger's wattage, the cable, and the supported fast-charging protocol. A 65-watt GaN charger and a 65-watt silicon charger will fill the same laptop at essentially the same rate, because the laptop decides how much power to draw. The GaN version may run cooler and take up less bag space, but it will not exceed the laptop's limit. If you want faster charging, buy a charger with more wattage than your current one, up to what your device supports. Also check for USB-C Power Delivery and, for some phones, Programmable Power Supply (PPS). A charger that lacks the right protocol may fall back to slow, basic charging even if its wattage number looks impressive.

Q: How many watts do I actually need?
A: Start with the device, not the charger. A typical phone is happy with 20 to 30 watts. A tablet often uses 30 to 45 watts. A thin-and-light laptop usually needs 45 to 65 watts, while a larger laptop or a machine that also charges over USB-C may want 90 watts or more. If you plan to charge several devices at once, look at the charger's total wattage and its