I attempted to do some regular battery maintenance on a recently acquired vehicle. The cells were all low on fluid so I added some distilled water to each cell. However, one of the cells was obviously not holding water. I assumed it may have frozen or cracked somehow.
After pulling the battery out for further inspection I noticed that there was a small hole drilled near the base of the battery into that particular cell. I added some more water and it all leaked out of the small hole.
I inspected the plastic holding box to see if there were any drill holes in it that might indicate someone had accidentally drilled into the battery. No holes.
Any idea why someone would have drilled a hole at this location in the battery?