Quote:
Originally Posted by markdb77
Thanks for the replies. I am using a laptop, will try the single port.
WMWiFi Router shows current draw while on AC power (wall charger) using WIFI connection is 700 mA when battery is charging, 300 mA at full charge
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I believe this has been posted in another thread but I'm not ambitious enough to look for it...
Each USB hub (internal to the computer) supports 1A max output. A dual-port connector splits this capacity (500mA max each) while a single-port allows the maximum output. This is why you can use a single-cable external DVD/HardDrive on some USB ports but on others you may need an extra USB cable for power (or use a power supply).
This is a simplified summary. An in-depth explanation can be found by searching over the last couple of month of posts on PPCG or checking Wikipedia on the subject (USB2.0).