I think a good battery will actually recharge itself after a while. After you have jump started it let it run for a while to charge the battery then disconnect the battery for the night and see if it starts in the morning. If it starts then it's probably the alternator, etc. If it doesn't start it's probably the battery since it can't hold the charge. If the alternator isn't charging, the alternator light should go on. The VX doesn't even have a clock so if you get a voltage reading between the battery terminal and battery cable when disconnected and engine is off then there is something pulling juice. Someone else, am I correct?