Repairshop says the radio (rcd330 plus rear usb mod) is causing the battery to die
I have a 2010 passat b6 and the radio has been installed for a year, it has never given any problems with the battery, and 2 weeks ago the battery died. The official vw repairshop said it was the alternator and replaced it and a week after that the battery was dead again. They say it's because of the radio, is it really posible that it has taken all this time to drain the battery. The battery is also from last year, about 2 months older than the radio and they say it can't recharge because the radio has damaged it's ability to recharge wich in my opinion makes no sense. Does someone know if the radio can really be the issue after all this time, it was bought on ddren website and it's an rcd330 plus with the rear usb mod.