Hello everyone

So my car needs to get it's battery changed, a VW 1,2 Tsi 105 highline 
DSG from 2010, so I was wondering exactly what battery to buy? I know it 
has to be a 12 volt battery, but that is all. I have a good friend who 
is a car mechanic, who can install it for me, but he does not have time 
to advise me about the battery at the moment.

So, he recommended me to get a battery from https://akkumulator.dk/ 
preferably, as he has good experience with buying from them. But if you 
have an international site you can recommend, I am open for that as 
well, though.