Originally Posted by biffer
What is a marine battery. Probably one that costs more and that's about it. Conditioners work well and use works better. But as regards marine batteries just get a good quality battery
I agree. If you think marine batteries are bad, try aeroplane batteries. My father used to own a Cessna 172, which had what was basically a bog standard lead-acid 072 battery in it ... except that because it had "aircraft" written on it, it cost 10 times as much as anything you've ever seen for a car, and lasted no longer
I just used normal car batteries in my old boat because that's all you can buy around here and the logistics of getting a proper marine one are ridiculously expensive. I got at least a couple of years out of mine on the old boat (it may still be in there now) and I just used to leave it on the boat, isolator off.
I wired in a set of terminals (bit like Anderson connectors, but they weren't - I think it was actually something intended for an electric lawnmower) and I had a 30ft lead that would reach out to the boat from a charger in my garage, used to top it up once in a while and always used the boat about once a month in the winter anyway, and no problems. I took out the connector and refitted it in Seawolf but the electrical output from the E-TEC is so good it seems to be keeping it right up to scratch anyway with it's monthly winter run.
Delphi batteries get my vote, my V8 Discovery is 9 and a bit years old and still on its original battery. It's getting tired now and needs the odd charge (not an everyday vehicle), but I'm trying to make 10 years just to impress myself