Hi folks.? I'm a newby and this is my first post.? Just purchased a 2003 Gulfstream BT Cruiser and the onboard battery will not stay charged.? It may be a bad battery (it was nearly dry when I checked it) and I'll have to drive it a ways in to town to get it tested.? I'm just wondering if there is something I'm leaving on in the RV that I'm not aware of.? All obvious switches, lights, etc. are off.? Thanks.