Sorry to hear of your battery problems Dutchman,
From your picture it definitely, (to me anyway,) it appears to have been "gassing."
Think back over the life of these batteries of any unusual situations that may have occurred:
-Ever been overcharged?
-Have you had any problems with your electrical Inverter/Charger/Alternator?
-Did you program the charger for the Lifeline's?
-Have you equalized the batteries recently, or do you perform this frequently?
-Don't discount weather-related activity, any extreme highs or lows of ambient temperatures that the batteries may have been exposed to?
-Are they outgassing excessively? It appears that the seals for the posts may have failed, which would be a warranty issue, and this is assuming there was no existing "crud" on the cables from before you installed the battery.
-Have you verified that the charging voltages are correct, per the data sheet.
I would give Lifeline a call and speak to their service rep about it. There were a batch of defective batteries produced a while back which did get out, and Lifeline made good on many replacements to owners who had gotten bad batteries. Not sure if yours are in that lot, but it wouldn't hurt to check with them and let them help you determine what's going on. They have a great customer service reputation, so you may be able to get some resolution from them on your leakage.
I've personally seen two year old Lifeline's that were bulging, due to improper programming of the charger by the installer. And, I've also seen many other non-Lifeline batteries that were scary to look at - also from unusual conditions or mistakes made in charger adjustments.
Here's some contact info on Lifeline. I definitely would give them a call, and make sure you save a picture to show them of the corrosion. I wouldn't clean them until after I called them about it.
Lifeline Batteries Inc.
292 E Arrow Highway
San Dimas, CA 91773
PO Box 637
San Dimas, CA 91773
Phone: (909) 599-7816
Fax: (909) 599-0596
Hours of Operation:
Monday through Friday 7:30am to 4:00 pm Pacific Time
And I'm not saying you've done anything wrong, and for sure it could be a defective group of batteries. Please come back and close the loop when you figure out what's going on.
Edited by Euphoria, 02 April 2021 - 07:03 AM.