Hi- i just recently purchased a 2005 crownline 21.6 ls. It has the 350 5.7 mercruiser. The battery controller which you use to turn from off, to 1, 2 or all is my question. It has a key to lock it on off, so that you can’t start the boat. However, when the battery switch is to off, i still have power. Lights, pumps, everything still will turn on. Is this normal? In my grady when i turned it to off, there was no power whatsoever. I know the bilge pump would need power, but this boat is on a trailer at the moment. Do i need to worry about the batteries dying? Thank you!