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Optima Deep Cycle Battery #15147017 07/31/24 08:25 PM
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daddyflea Offline OP
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Help this is my third Optima battery that has gone bad. They last about 6 months under light use. My only guess is my Bank Charger is knocking them out. The Optima site says to use AGM setting on the charger which is a Minn Kota bank charger. Should I change the setting or get a new Bank charger? I use a Noco Genius on my other boat.

Re: Optima Deep Cycle Battery [Re: daddyflea] #15147130 07/31/24 09:31 PM
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We used them (starting batteries) a couple years on our fleet, nothing but problems. Cancelled them and went back to Interstate....

Last edited by bronco71; 07/31/24 09:33 PM.

1987 Nitro MX185/Mercury Black Max 150 (needs lots of work, put motor on nephew's boat)
1994 XSC-2200 "Jaguar" AKA Shadow 22 Magnum (restoring w/Mercury 200 XRI)
1994 Pantera II (restoring w/Mercury 200 EFI)
1999 Triton TX21/225 Mercury Optimax
Re: Optima Deep Cycle Battery [Re: daddyflea] #15147277 08/01/24 12:32 AM
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You did not say which Optima you are using but my experience with the Blue Tops has always been great for troll motor use. They do not hold up well for engine and electronics. MinnKota on AGM setting is fine.


WORK HARD.....FISH HARDER!

GOD is Great...BEER is Good...and PEOPLE are CrAZy
billy currington
Re: Optima Deep Cycle Battery [Re: daddyflea] #15147311 08/01/24 12:55 AM
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Originally Posted by daddyflea
Help this is my third Optima battery that has gone bad. They last about 6 months under light use. My only guess is my Bank Charger is knocking them out. The Optima site says to use AGM setting on the charger which is a Minn Kota bank charger. Should I change the setting or get a new Bank charger? I use a Noco Genius on my other boat.


If your charger has an AGM setting you need to be using it. AGM's require higher voltage to charge. Using lead acid setting won't fully charge it and will kill it in short order.

Re: Optima Deep Cycle Battery [Re: RCarter] #15147383 08/01/24 01:54 AM
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Originally Posted by RCarter
You did not say which Optima you are using but my experience with the Blue Tops has always been great for troll motor use. They do not hold up well for engine and electronics. MinnKota on AGM setting is fine.

I found just the opposite to be true for me. They couldn’t run my Ultrex for more than 7-8 hours, but I have an 8 year old Optima Group 31 from my boat as my cranking battery in my Tundra and it’s been good for that when it seemed like it was dumpster time as a trolling battery.


Eat. Sleep. Fish.
Re: Optima Deep Cycle Battery [Re: RCarter] #15148186 08/01/24 08:09 PM
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daddyflea Offline OP
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Originally Posted by RCarter
You did not say which Optima you are using but my experience with the Blue Tops has always been great for troll motor use. They do not hold up well for engine and electronics. MinnKota on AGM setting is fine.

Using a Blue Top for Trolling Motor

Re: Optima Deep Cycle Battery [Re: tmd11111] #15148190 08/01/24 08:11 PM
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Originally Posted by tmd11111
Originally Posted by daddyflea
Help this is my third Optima battery that has gone bad. They last about 6 months under light use. My only guess is my Bank Charger is knocking them out. The Optima site says to use AGM setting on the charger which is a Minn Kota bank charger. Should I change the setting or get a new Bank charger? I use a Noco Genius on my other boat.


If your charger has an AGM setting you need to be using it. AGM's require higher voltage to charge. Using lead acid setting won't fully charge it and will kill it in short order.


I am using AGM setting on my charger. It runs fine then one afternoon I go out and it is dead, after being plugged in all night and day.

Re: Optima Deep Cycle Battery [Re: daddyflea] #15148200 08/01/24 08:15 PM
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Originally Posted by daddyflea
Originally Posted by tmd11111
Originally Posted by daddyflea
Help this is my third Optima battery that has gone bad. They last about 6 months under light use. My only guess is my Bank Charger is knocking them out. The Optima site says to use AGM setting on the charger which is a Minn Kota bank charger. Should I change the setting or get a new Bank charger? I use a Noco Genius on my other boat.


If your charger has an AGM setting you need to be using it. AGM's require higher voltage to charge. Using lead acid setting won't fully charge it and will kill it in short order.


I am using AGM setting on my charger. It runs fine then one afternoon I go out and it is dead, after being plugged in all night and day.


Not uncommon for AGM's to cr@p out like that whereas lead acids have a long painful death.

Re: Optima Deep Cycle Battery [Re: daddyflea] #15186899 09/10/24 01:39 AM
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You might want to check if your minnkota has 10 amp per bank

I’ve been using optima blue tops since 1996. Made in USA and Mexico, I never had a battery “die” before seven years of usage. You must charge as quickly as you can after getting off the water, you must have a charger that has 14 volt minimum and 10 amps per bank.
I have never used an onboard charger, I never felt they could take the abuse, I had Guest portable chargers for ever, but using single NOCO 10 genius for each battery now.

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