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Discussion Starter · #1 ·
I have an AGM battery in my 800. I took it out at the end of last season to put on the trickle charger. It had sign’s of developing corrosion on the neg terminal. I cleaned it real well and placed on the charger. After while it started this again. I’ve now had it off the charger for a few weeks. The voltmeter still shows 12.5 v but this seem to continue to get worse even while not connected to anything. Hmm?




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It’s pretty normal. Gasses escaping the battery react with the lead post. Undercharging can make it worse. Coating the terminals with petroleum jelly or grease will minimize it.

Keeping the car on a battery tender will also help.

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Discussion Starter · #4 ·
Thanks Wheel & CrazyE. Is this battery compromised since gassed are escaping? It is normally constantly on its own Tender charger. I will clean it and apply dielectric grease.


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what kind of battery tender? i'm not sure how the failure mode would present itself, but some battery tenders are not designed for AGM batteries.
 

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I just plug this in to my Weed Sprayer battery it’s AGM, New version charger.
P.S My Chinese AGM battery leaks from the negative post about five years old now just Grease it.
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