I’ve had my LX for a little over a year. It has dual batteries And a 4 position switch. I have been running the boat in the 1+2 position. Sometimes we anchor and run the stereo for 3 to 4 hours. Should I be switching over to battery one while anchored and then switch to 1and 2 to start? I don’t want to ever be in a position where we have drained both batteries. Thanks for any advice!