Huy Guys I have seen on this forum a thread related to this problem but where it is I dont know .
All I can tell you is my battery is now 8 years old and after each winter I have if needed it brought it home and charged it up on an 11 amp charger.
Maybe it will go down this year I dont know ,I think it must have been a reall y good one to start with
I hope this helps
Sir Roger