Originally Posted by DQM
If you just want a battery for starting the engine, and there is nothing else connected to it, your best bet is a small marine flooded lead acid or AGM starting battery, say a group 24 or 27, whatever has the CCA/MCA you need for your engine. Anything else would be a waste of money, since you would not need to worry about reserve time or AH. Again, assuming you have nothing else connected to it, your battery should be back to 100% charge in just a few minutes after starting from the engine charging it.
Common in the offshore world. Those guys will have $500k in engines all starting with a cheap group 24 or 27 lead acid or AGM battery because that is all it does is start an engine and nothing else, and no on board plug in charger for the starting batteries. Not needed. 10 minutes of running and they are fully charged. They work, are cheap and reliable. Hell, my father has been using the same group 24 for 12 years on his Evinrude 115 for starting (nothing else connected to it, and there is no plug in charger for it, not needed).
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