No expert here, but I don't think pg or vg would cause rust...no water in them. Hot/cold disparity draws moisture from the air and causes condensation, so first thought was putting them away hot in a fairly humid environment, then sealing it in the box. But then I noticed it's on opposite ends of the batteries, which is odd, since you say it is only at one end of each.I need y’alls brain power... married batteries, stored in a battery box. Pulled them out to charge to full, saw the corrosion and put them aside for recycling. I’ve checked my dual mods, no corrosion in them. None in the battery box. And it’s only on the one end of the batteries. The ends you don’t see look fine. I expected to find some evidence in a mod or corrosion View attachment 865013 on the battery body, but didn’t. What would cause this? I don’t have leaky tanks, or dual squonks that might lead to “wet” batteries. Help???
Seems you almost had to have had unnoticed moisture in one end of the box, or on the batteries when you put them away? And sealing them in there didn't let it dry out.


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