Battery change

[Cantata]

I'm sure this must have been covered somewhere but I couldn't find it on a search.

My 2012 S-Line Avant 3.0 TDi at last needs a new battery - yes, it really has lasted 14 years. So I found one last week, got a good price on a Bosch-branded replacement, assuming I could simply replace it myself.

However when I looked online to check there were no snags with fitting it,  I realised that the online diagnostics need to be accessed to 'tell' the car that it has a new battery. Question is, could I do this myself using one of the 'OBD2' access dongles that you can buy for £20-£30 on e.g. Amazon, or do I really have to get a garage to do it?

I actually bought one of these gadgets, a XTool AD20 Pro, but looking at it I'm doubtful as to whether it will do the job - it just seems to be about reading and resetting fault codes. Maybe I should return it and just take the car to a garage.

Edited 2 hours ago by Cantata