What setting should I have my battery charger on to charge my starting battery? It's not a deep cycle battery like the trolling motor batteries, correct? My choices are regular, deep cycle, or AGM. I know it's not AGM.
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What setting should I have my battery charger on to charge my starting battery? It's not a deep cycle battery like the trolling motor batteries, correct? My choices are regular, deep cycle, or AGM. I know it's not AGM.
Youd have to tell us what battery it is first. Guessing just a basic lead acid. Youd know if it was AGM, it would have costed an extra $200
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Regular setting would be the correct one for a starting battery. And hopefully it's a digital charger, so you can set it to charge and not worry about boiling the battery fluid down below the plates.
Came on the boat I just bought. My first electric start. Attachment 482125Quote:
Originally Posted by Kevin22
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Its a maintenance free lead acid battery. "Regular" setting will work fine, make sure you read a manual on the charger to see if it can be left charging for long periods of time.
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If you haven't done anything to it, it looks pretty clean ... but it's also a 4/2021 mfg'd battery, so it's coming up on being 3yrs old. Keep it charged up after every day's use, charge it at least once a month during the periods of not using it, and you should get several more years of use out of it.
I think the previous owner just let the alternator from motor charge it and he didn't get out often so it might not be in the best condition. Not sure.Quote:
Originally Posted by CrappiePappy
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My 90HP Merc 2strk will keep my Group 24 starter battery charged up if I run around the lake quite a bit (plus I let it idle while parking the truck & going to get the truck). But if I don't run around much, it still needs a little charging time to get back to "full" charge).Quote:
Originally Posted by 10point
If you don't think he kept it charged full after each use or during down times, or if the big motor is not that big in HP, you probably want to test it before depending on it out on the water.
What's the best way to test? Take it to automotive store? It also has accessories hooked up to it. I did just buy a noco boost jumb start just to be safe.Quote:
Originally Posted by CrappiePappy
I charged to 100% yesterday and it just said 90% this morning. I put the charger on it and in just a few minutes it said 100%. Is this bad?
I would get a good charger with digital charge rate display. They revert to a trickle charge and can be left on for a long period. 10% loss overnight probably means a bad cell/plate. Good thing you got that NOCO charger too. Check to see if any of your accessories stay on between charges. May be draining your battery unexpectedly.Quote:
Originally Posted by 10point
Mine has a digital display and is computer smart it says. Attachment 482189Quote:
Originally Posted by happycaster58
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Charge the battery unhook everything check voltage let sit a day or two and check voltage should be at least 12.5 if less then yes battery is on the way out. A regular load battery tester will not always show a bad battery.
Yeah, sounds like time for another battery to me. And Happycaster makes some good points, as well. I live in an apt complex and have to bring my 3 batteries inside to charge them, so I didn't even think about accessories bleeding off some charge.Quote:
Originally Posted by 10point
A way I sometimes test is to charge to 100% then let sit half to one day for the voltage to stabilize. Watch the voltage while you pull the kill switch and crank the motor over for 3 seconds. The voltage should drop substantially and then slowly rebound to a couple 10ths below where it was in a few minutes (starting at 12.4, it may fall to 11-11.5 while cranking and then slowly go back up to 12.2-12.4) . If it drops to 10-11v and stays there, battery is toast.Quote:
Originally Posted by 10point
Youll know if the battery is bad, it can sometimes be difficult to know if it is weak. An automotive shop will tell you its weak and they suggest you replace it to be safe, every time. I once took a return to AutoZone because i accidentally grabbed a 27 instead of a 29 and didnt notice until i went to install. I was standing by the counter waiting for help, and before i could open my mouth the "associate" said set it on that cart. I did so and he wheeled it to the tester and started hooking it up, by now im interested in what it will say so I kept my mouth shut. "Your battery is showing weak, but its within warranty so we can replace it for free today or upgrade you to a better battery for a fee". I said im good, i was just going to exchange it for the next size bigger, since i bought it last night and never used it (while handing the receipt over). The look on his face was hilarious, and the manager who overheard it was FUMING.
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I actually just sold the two trolling motor batteries that came with the boat. I gave they guy that bought them a "warranty" for a few hours so he could go have them checked out. O'reilys checked them and told them they were good.Quote:
Originally Posted by Kevin22
I was looking at new batteries. Would a dual purpose be better since it's got accessories on it? I can't find anywhere on my current battery where it says it's dual purpose. I think it's just a starting battery.
Yes it would, make sure it has enough CCA for your motor. Motor manual (or google search) will say what it needs. DP batteries are lower in CCA than starting of the same group size.Quote:
Originally Posted by 10point
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