Mine done exactly the same, not a hint of any problem, used it on the evening but the next day it was as dead as a Dodo.The dealer fitted a new one under warranty, Maserati apparently moaned and said I should use a trickle charger, but the car was being used most days so I didn't see the need, I've never used one on any of my other cars and they all get used in the same fashion without battery issues.Definitely a flaw with the car but Maserati won't admit it. Having said that, shouldn't complain too much as they are pretty robust and don't seem to suffer any major problems, I think most owners can live with needing a new battery now and again.