Seems like water leaked in the battery tube. The battery tube has been fine for a few pool dives. I didn’t see much bubbles when I did a quick check before diving on the side of the pool. Afterward I put the rov back in the water without the batteries to confirm the leak and I could not get any water to go in the battery tube… I only have this problem with the Li-NiMn batteries. The LiFePO4 make contact just fine in the battery tubes.
I did glue washers on top of the batteries because they were not making contact in the battery tube. Could it be the reason why this happened? Anyone has the same problem and has a better solution for making contact between the batteries in the tube?
Would you guys use the batteries again? Is there any test I can do to check them ? I don’t know much about batteries so any advice will be appreciated!