Needed a replacement charging/support cradle for my TomTom Rider 550. The cradle steps the 12v down to 5v and monitors the level of charge in the unit so quite complicated bit of kit despite appearances. The tiny sprung copper pins making the connection can fracture from their soldering inside the cradle. First one I had lasted 8 years, next one 2 so luck of the draw. This one was by way the best price online, is a genuine Tomtom part and is working perfectly so very happy to have my satnav running properly again and not shutting down after every pothole! Prompt delivery too.