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Charging batteries #13836617 01/07/21 10:17 PM
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Stratos2011 Offline OP
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Is it bad to leave an onboard charger in use for a long period of time (like say 1-2 weeks straight)? Is it bad for the batteries?

Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003
Re: Charging batteries [Re: Stratos2011] #13836621 01/07/21 10:18 PM
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HARD WORKN HAROLD Online Content
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NOPE. A good charger will trickle and then shut down when batteries are completely charged.


DON'T LET THE CLOTHES FOOL YA
Life is too short to fish with a dead cricket!
PB: wife of 40 years
Re: Charging batteries [Re: HARD WORKN HAROLD] #13836636 01/07/21 10:30 PM
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Originally Posted by HARD WORKN HAROLD
NOPE. A good charger will trickle and then shut down when batteries are completely charged.


This

I would add...it's always a good piece of mind to check them so they don't boil over if the water isn't maintained correctly. If they are AGM batteries no worries at all.

Last edited by avid_basser; 01/07/21 10:31 PM.
Re: Charging batteries [Re: Stratos2011] #13836755 01/07/21 11:54 PM
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I leave mine plugged in 24/7/365.


Eat. Sleep. Fish.
Re: Charging batteries [Re: Stratos2011] #13836852 01/08/21 12:55 AM
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Topwater2 Offline
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^^^^^


FishKen
Re: Charging batteries [Re: Stratos2011] #13836899 01/08/21 01:19 AM
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Dan21XRS Offline
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Nope they're designed to stay plugged in... A better question is... Do you feel lucky enough to leave it plugged in that long???... It only takes once and poof... Dan


"The problem with having a sense of humor is often that people you use it on aren't in a very good mood"...
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Re: Charging batteries [Re: avid_basser] #13836992 01/08/21 02:12 AM
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Originally Posted by avid_basser
Originally Posted by HARD WORKN HAROLD
NOPE. A good charger will trickle and then shut down when batteries are completely charged.


This

I would add...it's always a good piece of mind to check them so they don't boil over if the water isn't maintained correctly. If they are AGM batteries no worries at all.

cheers


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Re: Charging batteries [Re: Dan21XRS] #13837112 01/08/21 03:51 AM
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Originally Posted by Dan21XRS
Nope they're designed to stay plugged in... A better question is... Do you feel lucky enough to leave it plugged in that long???... It only takes once and poof... Dan


Definitely pull the trolling motor plug and/or flip the circuit breaker.
Doesn’t hurt to have a surge protector between the wall outlet and the onboard charger(s)


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Re: Charging batteries [Re: Stratos2011] #13837255 01/08/21 12:41 PM
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If you have AGM or lithiums and your battery is not being pulled down, its totally unnecessary to keep them on a charger. I religiously charge my trolling motor batteries every three weeks during the winter.
I just charged them last week. When I hooked the charger up it took 10 seconds for one battery to shut off and another minute for the other trolling motor battery.

Evidently my starting battery sees some drain. I charge it every week and it takes a couple minutes to shut off.
Mine are 7 year old Optimas and yes, I don't fish as often as I used to.


May 4, 2023
Originally Posted by OTFF
Once again, I agree with you.
Re: Charging batteries [Re: Stratos2011] #13838642 01/09/21 03:36 AM
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dk2429 Offline
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Mine stay plugged in 365 days a year when the boat is on the trailer.. If you have a trickle charger then no it's no issue


Majek 22 Extreme/225 Optimax Pro XS hauled by a 2500HD Duramax



Re: Charging batteries [Re: Stratos2011] #13838657 01/09/21 03:53 AM
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Jeff From Iowa Offline
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Originally Posted by Stratos2011
Is it bad to leave an onboard charger in use for a long period of time (like say 1-2 weeks straight)? Is it bad for the batteries?


No its not bad they are designed for that they are programed with a charge cycle and then go to a sleep or trickle etc, look up the specs on your particular charger to be certain.

I have a charger on my rv coach batteries, enclosed car trailer, rock crawler stored inside the car trailer, motorhome start batteries and my wifes Grand Wagoneer ALL winter.

My boat has lithiums so I dont have to leave it plugged in anymore.

Re: Charging batteries [Re: SteezMacQueen] #13839277 01/09/21 04:57 PM
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Originally Posted by SteezMacQueen
I leave mine plugged in 24/7/365.


This☝🏻 In the summer I leave the battery compartment open while it’s plugged in.


2022 Skeeter ZXR21
Re: Charging batteries [Re: Brandon Potter] #13839469 01/09/21 07:05 PM
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Originally Posted by Brandon Potter
Originally Posted by SteezMacQueen
I leave mine plugged in 24/7/365.


This☝🏻 In the summer I leave the battery compartment open while it’s plugged in.

Ditto all of the above.

Re: Charging batteries [Re: Stratos2011] #13839572 01/09/21 09:08 PM
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forkduc Online Content
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No

Re: Charging batteries [Re: Stratos2011] #13840183 01/10/21 10:24 AM
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Heck I leave my onboard MK 460(4 banks x 15 amps per bank) plugged in so much sometimes I drive away with it still plugged in! 🤔😳🤫🤪

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