2020 Macan GTS
Sorry, actually in the technical specification of the Porsche charger that I own it clearly states it can be used on all 12 V lead-acid batteries (WET,MF, Ca/Ca, AGM and GEL). It isn't limited to AGM. It is my opinion that this thread is packed with misinformation and hyperbole.Your Porsche branded CTEK DOES have an AGM mode. Its the default mode.
I would much rather have the real CTEK because you can use it properly on all kinds of batteries,