Can a 100W charger damage a device that needs less power?

No — USB-C PD negotiation means the device requests only what it needs. A 100W charger connected to a phone will only deliver 18-30W as requested by the phone.

Is 100W enough to charge a MacBook Pro?

Yes — 100W handles the 14-inch MacBook Pro at full speed. The 16-inch model officially uses 140W but charges fine at 100W, just slightly slower under heavy load.

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