I need my auxiliary battery replaced

Hi this is Dusty, I'm one of the auto experts on RepairPal's Car Genius team. Typically, the primary and auxiliary battery are on entire separate circuits that coordinate with their responsibilities. It definitely sounds like you may have something causing parasitic drain, causing the main battery to go low. Before replacing the battery, I would have a capable technician perform a parasitic drain test to determine the cause, otherwise the new battery will end up in the same condition. If you have any questions or need help finding a shop, give us a call at (877) 913-1554