I have a 2.0 diesel automatic Titanium X Mondeo that's just gone over 5 years old.
At about 4.5 years old I started to get intermittent yellow "Low Battery" info messages (*not* "Low key fob battery" messages) on the display when I unlocked the car, opened the door and the display powered up. Never had any problem starting. I put a smart charger on the battery and that said it was fully charged.
I had the battery replaced back in October 2018 and the problem went away. But in the last few weeks I've had two re-occurrences of it; again the engine starts quite normally. During a recent period of very cold weather it didn't happen; temperature was above 10C when it did.
I do mostly short trips, and not many of those lately. After the first re-occurrence a week or so ago I did 50 miles of motorway run, so I would have thought the battery would be fully charged? Is my driving pattern causing this?
The handbook would suggest this is a service issue. What might I do about this, if anything?