Modern car batteries shouldn’t need regular top up charges. I’d suggest taking the car to a reputable garage and ask them to check the state of the current battery and the efficiency of the car’s charging system.
If the battery is fading then the only sensible option is a good quality replacement. If the car’s charging system is below par then a new alternator is the most likely cure.
Using a charger risks simply masking either a dying battery or a charging system fault. But given how efficient modern alternators are my money is on the battery being tired. Like tyres, brake discs and exhausts batteries have to be viewed as service components that need to be replaced every few years.
Jack
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