Hi folks. I realize this is not exactly the best place to put this but I figured as boaters most of you would have an opinion concerning big, healthy batteries for your towning pickup trucks. Presently, I am driving a 2001 Dodge 2500 24 V Cummins. It has 2 Optima batteries in there right now, but I just had an Espar diesel fired heater installed in it to help keep me warm and keep the block heated as well. So far, I am not too impressed with the Optimas. They seem to get ran down quickly and don't want to come back up unless I run to Wasilla, or put a charger on the batteries. Do ya'll think I need to sell the Optimas and get some massive 31 series batteries, or change the alternator out for a high output one? Can you folks qualify your opinions please? Please offer an explanation of why you think that way. What are you folks running up here in your 2 battery setups? If anyone is interested, I might be able to sell these Optimas. They are only a couple or 3 years old but are in excellent condition. Thanks for any info.