what is the standard current output for USB ports on an HP notebook?

fredw56

Reputable
Sep 3, 2014
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I have been having problems with USB connected hard Drives since the 2.5" first came out. Most of my drives act as if they are not getting enough current to run. (Motor not starting or drive sits there and beeps, etc. Theywork fine if connected internally, but even with the dual usb cables I have problems. Most drives need about 550 mA. to run but what kind of current does a notebook supply?