What is a “Flooded Lead Acid” battery
Flooded lead acid (wet cell) batteries are one of the most common types of battery for deep cycle applications. The major difference between the wet type of battery and the sealed kind is that the end user is able to replace water lost through gassing via the vent caps in the top of the battery.
The flooded battery has been around for a very long time but remains popular because it has a good balance between price and performance. A gel or AGM cell battery is generally somewhere around twice the price per amp hour that you would find in a flooded battery.
Flooded batteries do require a lot more maintenance than their sealed lead acid counterparts, because the batteries are not recombinant the water is lost though the top of the vent caps while charging. Replacing this lost water can sometimes be an onerous task but it is a necessary one to get the most out of your battery.