At first sign of battery problems, I attach our smart charger. That gets rid of the short term problems.
If you use a car on short journeys in winter , the battery will never fully recharge. Running a battery - lead/acid- like that means you are effectively shortening its life compared to a fully charged one.
Me too. If you are on the original battery, you'll need a change. If the battery is only a couple of years old, it may just need to be regularly fully recharged.