Is there a limit to how long you can leave a trickle charger connected?

I see you have recommend the CTEK MXS in the past. Would it be suitable for my 2022 Vauxhall Crossland which, due to my unexpected poor health, is now only covering 2000 miles a year? Is there any limit...

Can I use a battery conditioning charger through a 12v socket in my car?

Can I use a battery conditioning charger (I think that’s the term) through a 12v socket in my car’s cabin? Obviously not one wired through the ignition switch.