Sump Pump Back Up Battery- adding water?

Question

My back up battery is saying that I need to add distilled water. Where do I add it? I have a Watchdog back up battery.

Answer 1

Unless it's a sealed battery, there should be a plastic cover you can pry up with a small screwdriver.   You add distilled water in each cell just to the fill line (slight ring in the plastic inside, or the top of the notch inside the hole).