Macbook pro usb c chargers4/7/2023 In this way it is "safe" and will not cause damage to the laptop components. If the power supply cannot put out some power level that the laptop wants then it will simply fall back and put out a "standard" USB 5V power. Many laptops will simply use the highest charging speed they can, but will limit performance on lower charge speeds. If you laptop actively wants more current than the PD charger can supply then your laptop may simply not charge and will tell you as much. In theory the power supply will state whether it supports 15V or 20V output, and what current levels, and your laptop (Mac or HP) will request the voltage and current that it wants. ![]() USB C PD allows devices to negotiate requested and supported voltages and currents. If the charger is a USB C one that supports PD (Power Delivery) then it should be fine.
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