hi experts,i wanted to know the output voltage of usb 2.0 as i have a mp3 player which charges through the usb but i am going away so i am purchasing a plug which allows me to plug the usb in to the plug then the plug plugs into a socket the plug is rated at 5v and if you require anymore information please ask.
USB is 5v and 500mA current. Just be careful that you don't overtax the USB port, because many report problems here after plugging in too many devices or devices that draw too much current. Even the standard 5v and 500mA is not always a guarantee by some manufacturers.