Well now, since my not too often driven 2013 FR-S seems to have a weak battery I decided to give it zap with the charger. Now, I did this about a month ago and it seemed to help. At that time I checked the level of electrolyte in the cells and it appeared that the cells "were covered" with fluid. I thought that was OK.
So, this time, when checking the cells, even though the tops of the cells were covered, I decided to add a bit of distilled water.
DANG! Each cell took about a half a cup of water!
Comments?