I have a 2010 Granturismo and have battery issues. I took it into the dealership and they replaced it with the standard Maserati (Fiamm) battery. Everything worked fine for a couple of weeks and then it all started again. While driving all of the electronics went crazy. Once I got home I turned it off and restarted it without any problem but couldn't get it out of park. I let it sit for a while and started it again without any issues except the battery light was lit up. I got on this forum and read some posts and it seemed like a battery maintainer/charger was recommended so I went and bought a battery tender 1.25amp and charged it. It took about 4 days to fully charge which seemed extreme. I drove it for about 10 minutes. I put it back on the charger/maintainer and it started charging again. The battery light is still on and was on while driving even though the battery maintainer/charger said it was fully charged. I am not sure if there is something wrong with the alternator or if something is continually running to drain the battery. Any ideas?