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Unverified78% confidenceTradeoffTime unknown

多接口型号(USB-A+PD+DC+MC4)兼容性更好，但同时使用多口会分流总功率，同时充多设备时单口速度大幅下降

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UnverifiedUSB-C口支持PD协议，USB-A口支持QC协议，双口同时使用时总功率会分配降低，单口使用时才能达到标称最大输出85% similar Unverified接口数量越多单口分到的功率越低，双口设计中USB-A口通常是QC18W降级口，真正的PD大功率往往只保留在其中一个C口83% similar Unverified体积小巧便携性好，但接口间距较紧凑，同时插多个较宽的USB设备时可能互相干涉81% similar Unverified接口全USB-C（PD）比USB-A（QC）更通用且未来兼容性好，但老设备的Micro-USB/Lightning线材多为A口，全C口需额外备C口线80% similar Unverified多口同时满负载时USB带宽共享，7合1以上无独立芯片的坞在接SSD+网卡+读卡器时会明显降速，重度多设备场景选带独立控制器的雷电坞80% similar

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