Unverified83% confidenceFactTime unknown
扩展坞本身无独立供电，所有接口的总功率受限于单根 USB-C 线缆，同时连接多个高功耗外设（如移动硬盘+HDMI+PD充电）时，实际可用功率会相互分摊
1
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83%
Confidence
Long-term
Relevance
-
First Seen
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Unverified带USB/Type-C扩展接口的增高架多为集线器方案，需占用主机一个USB口且供电受限，接高速外设或大功率设备时可能掉速；若已有独立扩展坞则该功能溢价不值84% similarUnverified笔记本仅有一个USB-C口且需边充电边扩展时，必须选带PD直通的扩展坞，否则扩展坞占用唯一接口导致无法充电82% similarUnverified带USB扩展的支架优先选带独立供电接口的Powered Hub，若仅用主板USB口供电，接多个设备时会因供电不足导致外接硬盘掉盘或充电缓慢82% similarUnverified购买带USB接口的节能插座时不建议追求USB插孔数量：多数插座USB总输出仅5V/2.1-3.4A共享，接口越多单口功率越低，无法快充，需大功率充电应单独用充电器而非依赖插座USB79% similarUnverified带独立DC电源的桌面型扩展坞比总线供电的便携坞更稳定，接多个高功耗设备（硬盘+高刷屏+外设充电）时便携坞易供电不足导致设备掉线79% similar
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