I have had this in my van for 2/3 years and it has been great. The screen started to ‘flicker’ and Halfords, where it was purchased from, said it was the battery that needed replacing. I bought a new one straight away. I have googled the issue and it all points to the battery which is available on EBay for about £10 and looks quite straightforward to do. I don’t need all the accessories that came with the new one, mine is already wired in, so I am giving them away too to the new buyer. Everything in the photos is what you will get !
eBay