DD, get the red top[starter battery]for lakeboating,get the bluetop[deepcycle]when you're ready to trade up for a deepwater barge.The Optimas suppose to hold charge for up to two years in storage.I have one in my 429 BBF equipped boat [was tough to start when hot]and it starts every time hot or cold.The only battery that performs better is a forklift battery [had one before],but weighs twice as much!