My battery is discharging to the point where I need to start the car every few days. I just bought the quick disconnect from Late Model Resto and disconnected the negative for 6 days while on vacation. The car started but the battery light remained on for about 20 minutes after starting, showing it's still having a good amount of drain even disconnected. The battery is brand new and is a AutoCraft Gold series from Advance. Anyone have any ideas?