Ferrariboy288

Evening All, Looking for a bit of advice and support please. I bought a second hand Fabia (2016 plate) earlier this year for my partner. Recently, due to various factors, the car wasn't used for a couple of weeks and the battery died. I called the AA out and they got the car going again, and they also tested the battery and advised that it had failed their checks as it wasn't holding a charge properly. Given I think it was the original battery the car came with it wasn't a surprise to hear this. I bought an EFB start/stop battery from Halfords last week and they came to fit it on my driveway. The car has worked absolutely fine since, including the start/stop system. The car has gone in to my local Skoda dealer today to have something else looked at. On the vehicle health check they have flagged the battery as 'Red - Urgent' saying that it needs to be replaced as it is 'non-genuine and will need coding to the system as it has a battery monitoring unit'. Given Halfords make a point of recommending using their services so that the battery can be registered with the cars system, along with the fact that the car has been absolutely fine over the last week and systems such as the start/stop have been operating as normal, it suggests to me that the new battery has already been coded and is working as it should? Are Skoda having me on here, or is it actually going to be an issue having a 'non-genuine' battery in the car? Given I spent £156 on a new battery last week, I'm not all that keen on paying the £340 they have quoted me to put a 'genuine' battery in. Thanks in advance for any responses.