U/S PSU

Nothing really serious, the power interface between the battery and the Sat Nav doesn't work. There is a little black box near the tank, with the button, and the button has packed in, the power won't stay on.
I'ver removed the U/S (unservicable) PSU (Power Supply Unit, although the power supply is really the battery of course, it's the little interface box that is faulty) and I'll have to order a new one from ebay. It wasn't expensive and it's lasted over 2 years.