Velvet
by Big Bore. 05/01/24 11:16 PM
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charging a boat battery and other questions.
#3127109
05/20/20 02:00 PM
05/20/20 02:00 PM
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Joined: Feb 2008
Posts: 15,688 Montgomery
bamaeyedoc
OP
Old Mossy Horns
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OP
Old Mossy Horns
Joined: Feb 2008
Posts: 15,688
Montgomery
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I have 2 batteries on the boat I'm dealing with. Dad put in an automatic charger for the battery that runs the trolling motor. I plugged it up to an outlet and in a several hours, it was up to 13 volts so I'm good there. My question is for the back battery by the motor. It's showing only 12.36 volts which seems to be about 75% charged. I've only ever used small battery charges for my ATV, deer feeder, and MOJO decoy batteries. I've never had the need to charge up a big battery. The battery charger I got from the boathouse is a Diehard that has settings for 2amp trickle charge, 10amp fast charge, and a 50amp engine start. It also has another switch with "AGM" and "Standard' settings. Should I set it up to charge using the 10amp setting and AGM or what? Once I have it on the correct settings, how long would it take to get it back to fully charged?
If I decide to put some LED lights on the bow, would I hook them into the back or front battery?
Do any of you have a homemade aerator live well. If so, did you hook it into another separate battery or use one of the onboard batteries.
Sorry for all these probably silly questions but again, I'm learning all this stuff for the first time!
Oh, and I got the navigation lights working! Turns out that there was a loose wire that has an end that fits over a battery terminal. Dad evidently just used it when he needed it and the rest of the time he just let it hang loose. It was tangled up with some other wires and I didn't see it until the other night when I was messing with all the wires at the back of the boat. I had a hunch it was for the lights so I just hooked it up to the negative terminal, flipped a switch by sonar mount and BOOM! I had stern and nav lights!
Dr. B
Last edited by bamaeyedoc; 05/20/20 02:06 PM.
AKA: “Dr. B” Aldeer #121 8-3-2000 Proud alum of AUM, UAB, and UA Member of Team 10 Point 2023-2024 ALdeer Deer Contest Winners
Glennis Jerome "Jerry" Harris 1938-2017 UGA Class of 1960 BS/MS Forestry LTJG, USNR
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127122
05/20/20 02:18 PM
05/20/20 02:18 PM
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Joined: Feb 2003
Posts: 12,107 Sylacauga, AL
poorcountrypreacher
Booner
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Booner
Joined: Feb 2003
Posts: 12,107
Sylacauga, AL
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10 amps and standard should work fine. A lot of chargers have a deep cycle setting, but if yours doesn't just use the standard setting. It shouldn't take but an hour or two for that battery, and it should cut itself off in some manner when charging is complete.
The little livewell pumps don't use a lot of power, so you could hook it up either way. Mine runs off the boat battery without an issue, but you could use the other one. Enjoy!
All the labor of man is for his mouth, and yet the appetite is not filled.
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127229
05/20/20 05:06 PM
05/20/20 05:06 PM
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Joined: Feb 2002
Posts: 44,211 North Alabama
Wiley Coyote
Freak of Nature
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Freak of Nature
Joined: Feb 2002
Posts: 44,211
North Alabama
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If you have a full charge and aren't gonna use the boat for a while I'd put it on trickle charge. A constant 10amp charge is more likely to boil the water out of the battery/will boil water out of the battery over an extended period of time and I've done this vey thing. For peace of mind you could switch it back to 10amps a few hours before you know for certain that you're going out. And if the batteries aren't sitting in battery boxes I'd get a couple and put the batteries in them. That way, IF you have a battery leak it will be contained and not go corroding/eating on other stuff.
I firmly believe that a double gallows should be constructed on the East Lawn of The White House. Politicians who willfully and shamelessly violate their oath to uphold and defend the Constitution of the United States of America should be swiftly tried and, upon conviction, publicly hanged at sunup the day after conviction. If multiple convicts are to be hanged they can choose with whom to share the gallows or names shall be drawn from the hangman's hat to be hanged 2 at a time.
NRA Life Member
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127357
05/20/20 09:17 PM
05/20/20 09:17 PM
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Joined: Jan 2004
Posts: 31,681 Slidell, La
perchjerker
Freak of Nature
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Freak of Nature
Joined: Jan 2004
Posts: 31,681
Slidell, La
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You'll never see any boat dealer run anything off the trolling motor. Believe it or not the bilge and aerator pumps use more power than lights. if you were gonna fish tournaments, I'd tell you to install a PROAIR system. It goes a long way towards keeping fish alive. I've owned a lot of boats. once the batteries are charged I unplug them. Maybe the night before a trip I plug them back in to see how they are holding a charge. If you have a bad battery you'll find one that isn't fully charged. Best to find it before heading to the lake. If possible I'd install a two bank onboard charger. Its a real pain to drag chargers in and out, its even worse once you've had an onboard and only have to run a power cord. good Luck
Thomas Jefferson. The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
Life is too short to only hunt and fish on weekends!
If being a dumbass was fatal some of you would be on your death bed!
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127404
05/20/20 10:22 PM
05/20/20 10:22 PM
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Joined: Feb 2008
Posts: 15,688 Montgomery
bamaeyedoc
OP
Old Mossy Horns
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OP
Old Mossy Horns
Joined: Feb 2008
Posts: 15,688
Montgomery
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It’s a 12 volt, Deca brand maintenance free marine battery. Had it charging on 10 amps for about 4 hours this afternoon while at work. When I got home and checked it, it did not charge it at all. However, green light on charger indicated the charge was complete. Still registered at 12.36-12.4 volts. All connections were secure. Whoever put battery in did not peel off the date stickers but I think it was replaced last summer when I had it serviced. Still looking for the receipt that showed what was done. Tomorrow I’ll try a 2 amp trickle charge on with setting on standard and see what happens.
Dr. B
AKA: “Dr. B” Aldeer #121 8-3-2000 Proud alum of AUM, UAB, and UA Member of Team 10 Point 2023-2024 ALdeer Deer Contest Winners
Glennis Jerome "Jerry" Harris 1938-2017 UGA Class of 1960 BS/MS Forestry LTJG, USNR
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127440
05/21/20 05:37 AM
05/21/20 05:37 AM
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Joined: Jul 2005
Posts: 3,597 Jackson County
CD
10 point
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10 point
Joined: Jul 2005
Posts: 3,597
Jackson County
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It’s a 12 volt, Deca brand maintenance free marine battery. Had it charging on 10 amps for about 4 hours this afternoon while at work. When I got home and checked it, it did not charge it at all. However, green light on charger indicated the charge was complete. Still registered at 12.36-12.4 volts. All connections were secure. Whoever put battery in did not peel off the date stickers but I think it was replaced last summer when I had it serviced. Still looking for the receipt that showed what was done. Tomorrow I’ll try a 2 amp trickle charge on with setting on standard and see what happens.
Dr. B One thing you can try is a meter on the battery while the charger is on just to make sure the charger is working. I wasn’t sure if you used the same charger that your dad used for the other battery. I had a charger once that would show the charge was complete but it wasn’t working at all. You should see 13+ volts on your meter if the charger is putting out.
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Re: charging a boat battery and other questions.
[Re: DryFire]
#3127446
05/21/20 05:54 AM
05/21/20 05:54 AM
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Joined: Jul 2005
Posts: 3,597 Jackson County
CD
10 point
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10 point
Joined: Jul 2005
Posts: 3,597
Jackson County
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What size is the single battery and how old is it? I run everything off my starter battery except the trolling motor. My main power drain are the two Helix units. I have to place them in standby when I start the O/B, otherwise they power off. My other power drains are front and back live wells and Nav lights. I've got a size 29 battery and I've never needed to charge it after I get home. If I ever run LED's I will also attach them to my starter battery. Except for the two Helix's, I'm rarely running the other stuff continuously at the same time while the O/B is shut off. Tex, are your units wired directly to your Group 29 or routed through a switch panel? I’m guessing a panel. They shouldn’t blip out on startup with that size battery if wired directly. I have a Helix 10 and an 1159 I can run all day and they don’t cut out even when starting the 225. My starting battery is only a 27.
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127627
05/21/20 10:51 AM
05/21/20 10:51 AM
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Joined: Sep 2007
Posts: 7,602 Hartselle, AL
trlrdrdave
14 point
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14 point
Joined: Sep 2007
Posts: 7,602
Hartselle, AL
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If the charger is working it should be 13.8 volts or above. Some will charge at 16 volts. A battery can show 13 volts and be dead. As soon as you put a load on it it will drop like a rock to a voltage that is consistent with however many cells are actually good. Testing a battery with out a load on it is useless. I have a neat little battery tester that is computerized that will tell me exactly where a battery is at in its lifespan. Not this exact one but closeTakes a lot of the guess work out of it.
"In time of war, send me all the Alabamians you can get, but in time of peace, for Lord's sake, send them to somebody else." General Edward H. Plummer
"Blessed are those who, in the face of death, think only about the front sight." Jeff Cooper
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127934
05/21/20 05:11 PM
05/21/20 05:11 PM
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Joined: Feb 2008
Posts: 15,688 Montgomery
bamaeyedoc
OP
Old Mossy Horns
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OP
Old Mossy Horns
Joined: Feb 2008
Posts: 15,688
Montgomery
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so an update:
I'm charging the battery with a different charger and NOT using an extension cord. The other charger didn't have enough cord length so I had to use an extension cord to reach the boat. I don't know if using the extension cord somehow diluted the charger's ability to charge or if the charger is defective. Either way, the multimeter shows that it's already up to 12.8 while charging so I know it's working now.
DMC, there is an onboard marine charger for the trolling motor battery. I plugged it in and it charged up perfectly last weekend. I may have to look into getting another one for both batteries. Thanks for the advice.
My wife's been watching me fool with the boat all week. She realized I didn't have a paddle so she made a covert trip up to BPS in Prattville and got me a set of camo boat paddles for my birthday today! She's awesome!
Dr. B
Last edited by bamaeyedoc; 05/21/20 07:34 PM.
AKA: “Dr. B” Aldeer #121 8-3-2000 Proud alum of AUM, UAB, and UA Member of Team 10 Point 2023-2024 ALdeer Deer Contest Winners
Glennis Jerome "Jerry" Harris 1938-2017 UGA Class of 1960 BS/MS Forestry LTJG, USNR
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3127949
05/21/20 05:30 PM
05/21/20 05:30 PM
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Joined: Jan 2004
Posts: 31,681 Slidell, La
perchjerker
Freak of Nature
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Freak of Nature
Joined: Jan 2004
Posts: 31,681
Slidell, La
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A lot depends on the gauge of the extension cord.
Thomas Jefferson. The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
Life is too short to only hunt and fish on weekends!
If being a dumbass was fatal some of you would be on your death bed!
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Re: charging a boat battery and other questions.
[Re: CD]
#3128258
05/22/20 08:20 AM
05/22/20 08:20 AM
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Joined: Feb 2015
Posts: 7,211 Meridianville
DryFire
14 point
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14 point
Joined: Feb 2015
Posts: 7,211
Meridianville
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Tex, are your units wired directly to your Group 29 or routed through a switch panel? I’m guessing a panel. They shouldn’t blip out on startup with that size battery if wired directly. I have a Helix 10 and an 1159 I can run all day and they don’t cut out even when starting the 225. My starting battery is only a 27. Power switch. One of my projects is to wire the console unit directly to the starter battery and use the power button on the unit. The front one is useless until I drop the TM. It is always kept in standby mode when the tm is up.
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3128271
05/22/20 08:54 AM
05/22/20 08:54 AM
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Joined: Nov 2015
Posts: 12,918 Old Florida
Geno
Booner
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Booner
Joined: Nov 2015
Posts: 12,918
Old Florida
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I had the same issue with bottom machines resetting on crankup when I ran the power through a console. I had to run the power directly to the battery and it stopped it.
Whoever is happy will make others happy too. Anne Frank
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Re: charging a boat battery and other questions.
[Re: bamaeyedoc]
#3128397
05/22/20 12:32 PM
05/22/20 12:32 PM
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Joined: Feb 2008
Posts: 15,688 Montgomery
bamaeyedoc
OP
Old Mossy Horns
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OP
Old Mossy Horns
Joined: Feb 2008
Posts: 15,688
Montgomery
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battery charged up fine today overnight. 12.9 volts this morning.
Dr. B
AKA: “Dr. B” Aldeer #121 8-3-2000 Proud alum of AUM, UAB, and UA Member of Team 10 Point 2023-2024 ALdeer Deer Contest Winners
Glennis Jerome "Jerry" Harris 1938-2017 UGA Class of 1960 BS/MS Forestry LTJG, USNR
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Re: charging a boat battery and other questions.
[Re: DryFire]
#3129905
05/25/20 05:27 AM
05/25/20 05:27 AM
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Joined: Nov 2013
Posts: 2,427 Prattville Al.
capehorn24
10 point
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10 point
Joined: Nov 2013
Posts: 2,427
Prattville Al.
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Tex, are your units wired directly to your Group 29 or routed through a switch panel? I’m guessing a panel. They shouldn’t blip out on startup with that size battery if wired directly. I have a Helix 10 and an 1159 I can run all day and they don’t cut out even when starting the 225. My starting battery is only a 27. Power switch. One of my projects is to wire the console unit directly to the starter battery and use the power button on the unit. The front one is useless until I drop the TM. It is always kept in standby mode when the tm is up. On my 2004 cape horn 24, running 2 garmin 840xs through the console and have never had a blink while cranking 2-150's, are those units pulling that much power?
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