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small/light starting battery options for engine/sonar/lights?
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<blockquote data-quote="Macintosh" data-source="post: 488654" data-attributes="member: 31571"><p>I'm looking at getting a new starting battery for a 25hp 1990's merc, which will also power a 9" sonar/gps, nav lights and a few very small LED interior lights. I have a giant of a commercial starting battery for this purpose in my bigger boat, but in order to maximise space and keep weight distributed where I want it, I'd like to go with as small a battery as I can realistically get away with and retain reliability. I do have a pull-start should this battery crap out, so it's not the end of the world, but I would like to be able to run sonar for at least 2-3 days without too much running to recharge the battery from the alternator, and if possible still be legal with nav lights, etc for a nighttime return. Anyone have experience with a similar rig that can offer experience or suggestions for some smaller batteries? </p><p></p><p>Note: Sadly, lithium is out of my price range and I'd like to keep using my current charger, which means I'm limited to regular wet-cell or AGM batteries. Mostly I'm wondering about size I can get away with based on others experience with smaller batteries. I see a standard group24 marine starting battery is about 45lb, that'll be my choice unless there is a good option well under that weight. Motor specification says to stay above 465MCA/350CCA.</p></blockquote><p></p>
[QUOTE="Macintosh, post: 488654, member: 31571"] I'm looking at getting a new starting battery for a 25hp 1990's merc, which will also power a 9" sonar/gps, nav lights and a few very small LED interior lights. I have a giant of a commercial starting battery for this purpose in my bigger boat, but in order to maximise space and keep weight distributed where I want it, I'd like to go with as small a battery as I can realistically get away with and retain reliability. I do have a pull-start should this battery crap out, so it's not the end of the world, but I would like to be able to run sonar for at least 2-3 days without too much running to recharge the battery from the alternator, and if possible still be legal with nav lights, etc for a nighttime return. Anyone have experience with a similar rig that can offer experience or suggestions for some smaller batteries? Note: Sadly, lithium is out of my price range and I'd like to keep using my current charger, which means I'm limited to regular wet-cell or AGM batteries. Mostly I'm wondering about size I can get away with based on others experience with smaller batteries. I see a standard group24 marine starting battery is about 45lb, that'll be my choice unless there is a good option well under that weight. Motor specification says to stay above 465MCA/350CCA. [/QUOTE]
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small/light starting battery options for engine/sonar/lights?
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