QUOTE ("rhollar")
How old is the battery? Will it go dead if it is disconnected? or is something on the machine causing it to go dead? Find a manual for the thing ( Hanes or Clymer will do) and they should outline testing the battery and charging system. With out seeing the machine its hard to say what parts need changing. You can troubleshoot, or you can start throwing money at it and hope you get lucky.