johnm1 wrote:
I don't know how many cells in each battery were bubbling. I only noticed that 1 battery had very small bubbles and the other battery had none.
Don't know if it matters but the one that was bubbling had the neg wire and the non-bubbler had the pos wire??
Keep observing, take notes, and learn.
Cells should bubble like champagne that's gone semi flat. This indicates they are getting closer to being fully recharged. The closer they get to a full charge, the more bubbles and perhaps slightly larger bubbles you will see in each cell chamber.