I didn't know anything about Mazda 6 initially until my friend asked for help. So I thought this would be a piece of cake until I ran the diagnostics on his vehicle and I told him that either his alternator or his electrical charging system is screwed because that was what my analyzer was telling me. Told him to go to the SC quick. Later he reported that the SC told him that everything was fine. Wondering what the hell just happened, with the help of forummers here, I had learn that the wiring system in his Mazda is not like anything we have come to know. It is completely different. Just like you said ghosting. So now I am will be working close with my friend like his Battery Manager to monitor his battery like a hawk.

Wait if you want the low down, refer to thread titled Battery brands that has lasted 4 years or more, Page 88, Post #1760 onwards, where I try to learn Mazda's new charging system. Have fun. If you or your friend have any questions, feel free to write, I am sure the good & knowledgable members around who are willing to help.

So are you implying that is the new Mazda wiring system ?

There are more & more car manufacturer using batteries which is small but high capacity like AGM/EFB base batteries. These batteries charging method are different compare to conventional type and control by dedicated ECU or DME board, most continental rides like BMW/Merc using these type of batteries got different charging pattern and need to register the batteries & type when new to calculate the charging pattern. It is not that simple nowadays for modern rides. I believe similar to Mazda they are also sensitive to different type of batteries, thus why some of them wont last long.

Sorry la bro., then you really dont know Mazda new wiring system. Based on my limited experience, now I dare to say to myself only, never assume things until one has figured out what exactly is one dealing with.

I can see that there are changes are coming with new battery management system and all in todays modern cars especially Perodua but that is just the way it is. Either for good or bad, we all have to deal with it.