Power

How USB-C Chargers Negotiate Power

A 100-watt USB-C charger does not normally push 100 watts into every device connected to it. A phone may take far less, while a laptop can request much more. The number printed on the charger describes what it can provide under supported conditions, not a fixed amount that every connected device must accept. That distinction makes USB-C charging easier to reason about. The charger, device, cable, and supported charging method all take part in determining the usable power. Once those pieces are separated, common questions about oversized chargers, slow charging, and cable choice become much clearer.