I just had my boat converted to a two battery system with a switch for both, 1 and 2. I am a little confused on what type of batteries to put in. Do I use a starting and a deep cycle or 2 deep cycles. (the boat is efi with digital ignition - not alot of start time) In addition - anyone have any experience with Optima Batteries?<br />What are good name brands? Most of the drain on the second battery will be stereo and lights at night - not heavy usage. Any advice would help!