Group 31 Battery recommendation (3 Viewers)

[lesgarten]

My Sears group 31 AGM is going south on me after a decade or so. I have the Slee battery box upgrade for group 31.

Anybody have any good recommendation for an AGM grp 31 that won't kill my wallet but be good quality? Can't really complain about the Sears Platinum, been a good battery.

 

[AlpineAccess]

I have an interstate for Costco that's been good for a few years

 

[dogdaysindurham]

I run the Group 65 AGM, but BatteriesPlus's X2Power has been really good to me with a 4 year warranty.

 

[UZJ100LC]

i thought our alternators dont charge AGM batteries to their intended capacity. Is that not true?

 

[lesgarten]

I paid $218 for that rebranded Odyssey 2150 in Jan 2013. Would Love to find that deal again.

 

[dogdaysindurham]

I run a voltage booster MK3 Mini blade 7.5A (Electronic fuse version) | HKB Electronics - https://www.hkbelect.com/product/104-mk3-mini-blade-75a-electronic-fuse-version-2005/ and use an AGM charger monthly. But in the past 3 months, I have my hood solar panel installed and it has kept both my Group 65s topped up.

 

[kwon-offroad]

i thought our alternators dont charge AGM batteries to their intended capacity. Is that not true?

On paper, yes it is true. OP needs to check his alternator running voltage, and not just at startup. if it drops below 14v as an OE alternator will, then an AGM is just a waste of money and the battery is slowly suffocating unless it is trickle charged to keep it healthy or a voltage booster is installed.

The Costco Interstate 31 is about as good as it gets from a quality and price perspective.

 

[lesgarten]

On paper, yes it is true. OP needs to check his alternator running voltage, and not just at startup. if it drops below 14v as an OE alternator will, then an AGM is just a waste of money and the battery is slowly suffocating unless it is trickle charged to keep it healthy or a voltage booster is installed.

The Costco Interstate 31 is about as good as it gets from a quality and price perspective.

Voltage booster? Like in post #6? How much is the Costco 31?

 

[AlpineAccess]

I paid around 140 with my core exchange at Costco. Three years ago

 

[Land Shark]

I have a group 31 Odyssey in my 2015 4Runner (smart alternator) I use a combination of two things to keep the battery healthy. (1) installed a voltage/amperage device that fools the alternator into putting out more "amps" that is 4runner specific. (2) every week, overnight, plug in my NOCO battery charger that I have installed in the engine bay to "top off" and maintain the battery as it needs. I also in the past have just used method "2" above and the battery has been pretty happy. This battery is currently 5 years old. I have a fridge installed that runs 24/7. YMMV

 

[tjgreg]

Have been running Interstates from Costco in a half dozen vehicles and have been very happy with them.

 

[lesgarten]

On paper, yes it is true. OP needs to check his alternator running voltage, and not just at startup. if it drops below 14v as an OE alternator will, then an AGM is just a waste of money and the battery is slowly suffocating unless it is trickle charged to keep it healthy or a voltage booster is installed.

The Cost

 

[lesgarten]

For you folks that buy the Costco batteries, Are they AGM? How much are they? I cannot find any grp 31 batteries on their website. I ordered the voltage gadget from Oz.

 

[AlpineAccess]

For you folks that buy the Costco batteries, Are they AGM? How much are they? I cannot find any grp 31 batteries on their website. I ordered the voltage gadget from Oz.

Mine was just an interstate regular lead acid, I think it was around $140

 

[lesgarten]

Mine was just an interstate regular lead acid, I think it was around $140

Did they have AGM grp 31 as an option?

 

[dogdaysindurham]

My local Costco's is carrying AGM interstates now.

Sam’s Club carries the duracell/energizer agm. Which I think are Deka AGMs.

 

[AlpineAccess]

Did they have AGM grp 31 as an option?

At the time I didn't look, I dropped Costco a year ago after we moved further away from the only store in our area

 

[kwon-offroad]

For you folks that buy the Costco batteries, Are they AGM? How much are they? I cannot find any grp 31 batteries on their website. I ordered the voltage gadget from Oz.

I had to get them to order it at the counter. Mine was a standard flooded 31 but he asked me about an AGM.

 

[lesgarten]

I purchased membership, I'll go get it Monday and do some Battery shopping I guess. Thanx for all the info guys!

 

[Pucker5]

The diehard 31 agm is 269$ through advanced auto but I would bet if you can find the Duracell 31 agm is cheaper through sams