A corporate user reports that their laptop charges extremely slowly and continuously drains its battery during resource-intensive tasks, even while connected to an external high-wattage USB-C power adapter. Physical inspection reveals that the power cable is plugged into a USB-C port marked only with a standard SuperSpeed (SS) logo, while an adjacent USB-C port features a lightning bolt icon. Which of the following is the MOST likely cause of this issue?
- The connected USB-C port only supports standard USB data and low-power bus specifications rather than higher-wattage USB Power Delivery (USB-PD) standards.Answer
- BThe laptop's physical USB-C port configuration requires a vendor driver update in the operating system to activate power negotiation.
- CThe smart Lithium-ion battery needs to undergo a deep discharge cycle to recalibrate its wattage detection over standard USB ports.
- DThe system motherboard automatically disables battery charging across all external ports whenever system workload spikes.
Answer
The connected USB-C port only supports standard USB data and low-power bus specifications rather than higher-wattage USB Power Delivery (USB-PD) standards.
While USB Type-C defines the physical connector, power delivery capabilities vary across individual ports on a laptop. Ports labeled solely with SuperSpeed (SS) icons typically support standard USB data transfers and baseline lower wattage, whereas ports labeled with a lightning bolt icon support high-wattage USB Power Delivery (USB-PD) and/or Thunderbolt protocols required to run and charge modern laptops.
Step-by-Step Solution
Key Concept
USB Power Delivery (USB-PD) and Thunderbolt port capabilities on mobile devices
Estimated Time:1m 15s