I've no idea what Halfords do or what tool use for their free battery checks, you need to check state of charge and state of health but these figures by themselves don't tell the full story and like an MoT (whether passed or not) relates only to that one point of time and conditions. Halfords will offer this free service because they sell batteries, their battery are good, whether under their own label or not but generally are higher priced and they have a different system of battery numbering than other places and I'm not sure about their fitment database as they are more car/pushbike/other generalised. As with all companies some of the people there are very good (if allowed to be by their bosses or the company) but some aren't and/or aren't given enough (any?) training. So if I've got it right, 2019 Kamiq petrol, manual, SE-L (so more standard electric bits fitted and/or activated by VW, then if you list the electric driver "aids" and "assists", standard fitting and extras that might have been added you'll get an idea of how long the list is of possibly electric use by the driver that the battery and alternator have to power. These two items are very related if one isn't in good condition then the other has to work harder so both wear more, though of course the wear on alternator is relative and doesn't mean it should play up until many years of use (decades with the better Japanese cars and alternators, or at least it used to be smaller batteries and smaller and more efficient alternators, the Germans like lots of weight to their vehicles). ETA: Good luck, let us know how you get on with the free Halfords battery check and if you can post a photo of the battery with label info I and other may be able to advise you on that and a replacement if required - and if you can't get it out of the Dealership if appropriate, I'm not always against Dealerships as in a previous life I dealt with the general public for decades so I can see good and not so good or bad in both sides (and before anyone thinks different I don't think you're not so good or bad, not by anything you have posted in this thread and that's all I know of you).