Bought a group 31 for my cranking battery. What is a good charger for this battery?
Bought a group 31 for my cranking battery. What is a good charger for this battery?
About any decent onboard will work. They aren’t very particular about charging. MK PC series or Dual Pro are good choices.
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
Optima recommends nothing larger than 10 amp per bank
How bout a charger that’s not onboard?
Optima 1200 charger charges at 12 amps and recommended by them. Every other thing I have seen for AGM batteries is .2C = 20 amps on a 100 AH battery. Their 31 size battery is 75 ah, that would work out to be 15 amp max. Bob
Tell me where has a slow movin' once quick draw outlaw got to go
I run a Blue Top 31 and have charge it with a Duel Pro for going on 5 yrs now. Never had a problem or an issue. My Trolling batteries are TRP grp 31 NO MAINTENANCE 160 ah batteries that I get at the local Peterbilt dealer for $105 exchange, and they are over 5yrs old and still going strong !!!
Ranger Boats / Mercury Motors
G Loomis Rods / Shimano Reels
Raymarine / MinnKota Ultrex
Garmin / Live Scope Plus
Pepper Jigs / Robo Worms
Troll Bridge / V-T2 Vents
They apparently aren’t picky about what Charger. I charge my 9+ year old Optima TM batteries with a 12 year old Cul-M-Rite charger. Optimax does recommend 10 amps max charger rate, although as bobcoy stated their charger is 12 amps.
BassCat Sabre FTD
Mercury 150 Optimax
"It's just fishing"
That's an amazing service life for a battery that seems to get so much negative reviews in here...LOL I know changes in manufacturing sometimes can create problems but I changed from Interstate batteries to Optima 3yrs ago because of similar stories like yours.Originally Posted by RazorCat
They apparently aren’t picky about what Charger. I charge my 9+ year old Optima TM batteries with a 12 year old Cul-M-Rite charger. Optimax does recommend 10 amps max charger rate, although as bobcoy stated their charger is 12 amps.
Wes
Helix 10 MSI+,MDI+,Ultrex IPilot
2023 Phoenix 818
Never assume there's a tomorrow
I had a 31 Optima run 5 years. Only problem was the amp hours too low for the electronics. Got a house battery for that stuff. Bob
Tell me where has a slow movin' once quick draw outlaw got to go
The battery charger has several different settings for different batteries. If you select the optima batteries in in the battery selection setting the voltage doesn't go over 10 ampsThey apparently aren’t picky about what Charger. I charge my 9+ year old Optima TM batteries with a 12 year old Cul-M-Rite charger. Optimax does recommend 10 amps max charger rate, although as bobcoy stated their charger is 12 amps.
You guys do realize if you have depleted your cranking a little by running electronics and livewells for while, when run the big engine you will be charging that battery at 25 plus amps untill the voltage rises some what. Todays on board chargers work in a very simlar fashion. A twenty amp automatic charger will provide twenty amps for a bit and as battery resistance goes up charge rate will go down, A twenty amp on board charger with the correct profile will not harm your agm battery any more so than the alternator on the big motor. A shop charger with adjustable charge rate set to high will cause damage
Thank You Leon Pugh
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