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AGM batterie problem

When checking house batteries today I found significant amount of corrosion on the negative terminals of two of the batteries.
I did not think you would get corrosion on a AGM batterie. Batteries are one year old. Batteries were put in by FOT and it looks like there is a clear coating on the terminals. Anyone have any idea why I would be getting corrosion on these batteries?
2003 U320 40'
2016 Jeep Wrangler

Jim

Re: AGM batterie problem

Reply #1 –
Good job checking on things like your batteries.  I wouldn't worry about it too much. Corrosion can come from reactions to many sources.  Clean the terminal posts and cable ends well and spray on a corosion inhibitor like CorrosionX and reassemble.  Check the terminals every few months to make sure they are tight.  All part of a normal maintenance routine.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: AGM batterie problem

Reply #2 –
I would call the manufacturer of the battery and talk to them. In all of my dealings with AGM batteries I have never had corrosion issues, I.E. sealed battery. You may also want to make sure you battery chargers is working correctly, and not over charging.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: AGM batterie problem

Reply #3 –
I have never seen white powder from corrosion on sealed AGM battery posts.
Are you sure they are sealed AGM batteries and not "maintenance free" flooded?
If they are sealed AGM, I would look for evidence of cracks in the case or leaking around the posts.
Use baking soda in water to wash the posts and cables and watch for boiling/frothing which indicates presence of acid.
Wyatt
96 U320 40 WTFE, build 4943
84 Toyota Supra towd
2015 Jeep Wrangler towd
Victoria, BC, Canada

Re: AGM batterie problem

Reply #4 –
Quote from: P. Wyatt Sabourin –
Are you sure they are sealed AGM batteries and not "maintenance free" flooded?
I checked out Jim's batteries and they are Lifeline AGMs (3). The positive terminals are clean as a whistle but the negatives have a pile of yellowish clumps around them. I've only dealt with wet cells so suggested he post here to tap into the collective hive mind of ForeForum.

I advised him not to clean them until after posting. Wyatt I like your idea to clean with baking soda and look for bubbling. I'll pass it on to Jim he's not addicted to FoFum as I am. Thanks!

see ya
ken
The selected media item is not currently available.ken & dori hathaway & Big Agnes
🍺1992 U300 GrandVilla WTBI #4150 FOT FBP 2011
✨6V-92TA DDEC Parlor Coach 350HP Series 92
🏁2011 Nissan XTerra Pro-4X

Re: AGM batterie problem

Reply #5 –
I would be talking to lifeline sounds like a leak around the neg post(s).
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: AGM batterie problem

Reply #6 –
We have had Lifelines in the coach since March 2011 and they are as clean as day 1 so I for sure would talk to Lifeline. They are expensive batteries to replace.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: AGM batterie problem

Reply #7 –
I installed two Lifeline AGM 8D batteries in May, 2010 and was disappointed when their capacity had reduced to 20AH and 40AH by Nov 2015, so 5.5 years and about 1200 cycles (to between 80% and 90%). The other 8D, a Lifeline Gel from 2003 had reduced to 65AH after 12 years and over 2000 cycles. Lifeline told me in May 2010 that their AGM batteries would last as long as a Gel due to chemical changes made.
Wyatt
96 U320 40 WTFE, build 4943
84 Toyota Supra towd
2015 Jeep Wrangler towd
Victoria, BC, Canada

Re: AGM batterie problem

Reply #8 –
You can seal the area between the lead post and the plastic battery case using silicone.  Clean the area around the post, apply the silicone and let it set up before attaching the cable.  The silicone will keep any fumes from leaking out.
 

Re: AGM batterie problem

Reply #9 –
Just read this and I also have one neg, post out of my 3 batteries that gets corrosion on it, it is the only post that I have issues with, my batteries are Lifeline and 5 years old. I will check and see if any cracks,
Adam Byler
1999 U320 M4200 DGFE Build #5389
2014 Sundowner 26 ft Enclosed
2015 Ford F150 King Ranch crew cab