battery madness

[Ron07x5]

So someone tell me if you disconnect your battery for 48 hours will ia e70 forget the battery registration? My theory is my x5 fried my AGM BMW battery in a few months after doing just that! I will be getting a carly scantool to find out if I am not regostered and to register a new differnent battery.

So it seems BMW wants to as quickly as possible charge a battery based on the AH rating of the registered battery and when you lose that registration the BMW system overcharges at max? yikes! Seems BMWs fear is not having the juice to run the fans to cool expensive turbos when someone is doing just short trips to the grocery store?

AGMs do not have much acid-fluid and lead-acid have more, so cheaper lead-acid can handle being overcharged better than Agm bmw batteries.

So My plan is to get a slarge as possible lead-acid group 95r and register it as having two thirds the amp hours it does, this to get the BMW charging system to treat it nice, Live long and prosper is what I say! Then once a month charge the battery and it better not take long before I see a full charge.

So what do you think?