Ford Focus 2017 St-Line Stereo sound problems

[Elephata]

Hi guys,

I purchased a Ford Focus 2017 ST-Line automatic a few months ago and it has developed a problem in the last couple of months with the sound coming from the Speakers. Sometimes when I am driving at a slow speed or when the traffic start stop fuel saving feature comes into play the sound from my Speakers becomes noticeably fragmented and the song tends to lag and skip a second or two. This only started happening since I left the car parked for about two weeks without driving it during this Christmas winter. I have a feeling that one of the Speakers may have stopped working and that it's possible that one of the connections on the head unit may have been fried but I'm just guessing here. If anyone has any ideas to what it might be I'd really appreciate it.

[NE0]

Low battery / Poor battery health?

[Elephata]

I did replace the battery because it died a couple of months ago, however I replaced it with a new one from Halfords, fitted by Halfords. It wasn't a Ford battery. Do you think this is what might be causing it?