I purchased this plug to see if it would work with the Mediabridge Brand USB to Micro USB card that I had purchased, because after getting the cable, my tablet wouldn't charge plugged into just any outlet.  I have a NOOK Color, and that plug worked to charge the tablet.  So I saw this one (at the largest Mass Merchandising store) for half the price here at Amazon and purchased it to try.  And it works.  Charges my Toshiba Excite perfectly through the micro USB port.  Now I can leave my original plug and cable at home and use this Nook Plug and Mediabridge Cable at work.  Perfect!  No more cords in my purse.