A Wet Flooded Battery Is The Most Commonly Used Car Battery

wet flooded batteryWet batteries, or a wet flooded battery as they are commonly known, are still the most widely used car batteries. They have been around for longer than other types of lead-acid types (such as gel or AGM batteries) and are the type of cell configuration that most motorists will probably be familiar with.

The most common configuration used to manufacture these particular batteries are Hybrid versions. The positive grid has an antimonial plate, and the negative a calcium plate. The positive antimonial plate provides quick recovery from a state of deep discharge, a longer life cycle and high resistance to corrosion degradation caused by high temperatures. Moreover, the negative calcium plate offers high strength to over-charging, longer storage life and reduces the rate of water loss.

A wet flooded cell battery contains an electrolyte solution of water and liquid sulfuric acid. These batteries have traditionally needed to be filled with water to replace lost electrolytes. When you add water, you can also check the specific gravity of the electrolyte.

There are also sealed maintenance free wet cell automotive batteries available. They are designed so that a minimal amount of water evaporates and operates throughout the life of the battery without having to be serviced. The majority of maintenance-free batteries are configured with positive and negative calcium plates.

However, always choose an accessible maintenance free unit for long-haulage heavy vehicles driven in warm to hot climates daily non-stop, where electrolyte evaporation is exponentially increased. This decreases a fully-sealed battery’s serviceable life due to a condition they can succumb to, called “Dry-Out.” This is a widespread problem, especially with Trucks, and the very reason they are shifting towards accessible batteries, allowing electrolyte top-up.

The Advantage And Disadvantages Of A Wet Flooded Battery

One of the main benefits is that they are the cheapest form of car battery on the market. They are widely manufactured, and the manufacturing process has been refined over decades, making them very efficient. It’s likely that whatever shape or size of the vehicle battery you need, you will be able to find a wet cell that suits you.

One of the disadvantages of a wet flooded battery is that it can be corrosive, especially if not maintained properly. If the electrolyte leaks, it could damage several things it comes in contact with, namely you, the battery and its surroundings.


Even sealed maintenance-free batteries need to be kept upright as they can also leak through their venting plugs. Only an AGM or Gel battery can be truly called non-spillage maintenance free.

We highly recommend a great resource on common frequently asked battery questions. (Opens in new window)

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