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I just got an AGM battery for my truck, and we have a charger that has conventional and maintenance free deep cycle. Is the second option ok to charge an agm with? The chargers really old. I don’t plan on needing to charge the battery as that’s why I spent extra on an agm but you never know so I figured I’d ask before it happens. This is the only photo I have of the charger
AGM batteries need a different charge profile.
That charger does not have the ability to charge it properly.
Your truck does not have the ability to charge it properly if it is the 88 in the sig..
Either way it may hold and provide some useful service, but you are going to have a very short and disappointed life expectancy with that AGM.
The chargers used for AGMs do have a different rate of charge
Your old charger may just not fully charge the AGM battery (first go round)
Just charge it twice or three times and watch the amperage it is taking go down
You should have no problems running that battery in your truck
I deal with Harleys a lot that have been switched to AGMs and have experienced no problems (so far)
Same with cars, I have had no trouble with AGM batteries except for the cost
Lead acid batteries sure are cheaper
You turn your truck on its side or get wheeling real heavy, and you'll be glad you have the AGM
Moab anyone?
Work on a lot of Jeeps too
Read this...^^^^^^^^^
Not going to type what that article will tell you.
Almost every battery manufacture will tell you the same, because they all are basically the same profile.
AGM requires higher voltage. Charging with the same charger several times does not change the way the charger will do its job. Your alternator on your truck was designed for flooded batteries and will work fine with sealed, not AGM.
The new vehicles have computer controlled voltage regulators designed for either flood/ sealed or AGM, however the computer must be told what it is charging so it can change the charge profile.
The corner store wants to sell you the battery. Most do not care that it is going into something that can not properly maintain it and will not tell you that.
AGM batteries require a higher voltage to fully charge compared to standard lead acid battery. Your 130 amp alternator has more amps, but the same standard voltage. I would not sweat it. Just throw it on an AGM charger once a month to top it off.
I would bet that the maintenance free setting is for AGMs. Hook up your charger to your battery and switch between the 2 settings and use a multimeter to see if there is a difference in the charge voltage.
I have a had good luck with AGM starting batteries.
Flooded lead acid and AGM batteries use very similar voltages; 12.6 vs 12.8. AGM batteries run a slightly higher voltage so it's more tolerant to charging with a standard charger than a normal flooded lead acid. AGMs are still lead acid batteries, so there's nothing special you need to do.
Max charging voltage should be around 14.2+-0.5v.
Smart chargers will max out at ~14.5v and then reduce the voltage to around 13.2v after it detects a drop in charge amperage.
Dumb chargers will keep it at 14.2v and you'll need to disconnect it yourself. After it's charged, leaving it connected at voltages above 13.5 will convert the excess energy into heat. The more voltage means more heat. More heat will slowly damage the battery.
Flooded lead acid and AGM batteries use very similar voltages; 12.6 vs 12.8. AGM batteries run a slightly higher voltage so it's more tolerant to charging with a standard charger than a normal flooded lead acid. AGMs are still lead acid batteries, so there's nothing special you need to do.
Max charging voltage should be around 14.2+-0.5v.
Smart chargers will max out at ~14.5v and then reduce the voltage to around 13.2v after it detects a drop in charge amperage.
Dumb chargers will keep it at 14.2v and you'll need to disconnect it yourself. After it's charged, leaving it connected at voltages above 13.5 will convert the excess energy into heat. The more voltage means more heat. More heat will slowly damage the battery.
I was going to say, op will have no issue using the battery in his truck. But to charge it the best, Utilize the Sense wire on the alternator and place it far away and distance from the battery charge connections so the more voltage drop it has to overcome, meaning it will push out a bit more.
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