Agree with Mitch , I bought an accessary cigarette lighter socket from ALdi £2.99, 3 cigarette sockets and 2 usb sockets built in, cut off the male cigarette lighter plug, fitted and inline fuse and attached straight to battery terminals, all tucked under the saddle with a 2m usb lead under the tank to a phone case on the handlebars and use my phone as a sat nav,and mp3 player via bluetooth,done 12,000 miles so far without a problem