Read: How to check Power Output ... to ensure that the USB does not work when anyone connects it to the PC, using this Microsoft Fixit 50061 [This has been taken down by Microsoft now].

To turn off/disable just slide down the switch. In this post, we will look at how to enable or disable USB Read or Write access using the software method. On the right pane, right-click the ...

[Paul] recently purchased an inexpensive USB power pack, hoping to use it for powering ... to keep it on — any less and it would switch off after a few minutes. The final transistor based ...