What is a flooded battery?
The term ‘Flooded battery’ generally refers to a conventional lead-acid battery with a liquid electrolyte inside. These batteries are equipped with removable caps to replenish the water lost during charging. Some EVs, which use these batteries, are equipped with automated watering systems. In addition to lead-acid based batteries, some nickel-cadmium and nickel-iron batteries are made in flooded versions. Flooded batteries tend to be less expensive and more forgiving of overcharging that sealed batteries, but they can require addition cleaning and servicing.