These batteries are a variation of sealed batteries, requiring minimal maintenance apart from recharging if they become excessively discharged. They differ from traditional sealed flooded wet cell batteries in that they incorporate advanced valve designs to prevent electrolyte spillage or shifting within the battery. They can be produced in various styles, such as gel cell and AGM formats. These batteries represent the current state-of-the-art design, as they are more resistant to disruption caused by movement or inversion compared to older designs.
Gel cell batteries represent a high-quality design in terms of electrolyte usage, offering the benefits of a fluid electrolyte without the associated instability and risk of spillage. While dry cell batteries are generally cheaper and may have a shorter lifespan, gel cell batteries excel in maintaining stability across a wide range of temperatures, ensuring consistent efficiency in various driving conditions. It is important to note that batteries still have their operating limits, so it's advisable to check the temperature rating of any battery you purchase for your car.
Deep cycle batteries are widely used in recreational boating and camping as a primary storage component. They can be recharged, have a long lifespan, and provide deep power capacity. Despite longer charging times, their sustained power makes them suitable for demanding tasks. While less common in automotive applications, deep cycle batteries are favored by performance battery designers seeking to optimize sustained output. They enable extended accessory usage without the engine, power additional lighting and environmental systems, and offer increased cranking output in cold weather when designed accordingly.
Dry cell batteries, unlike wet cell batteries, utilize a glass mesh to absorb the electrolyte. This design minimizes the risk of spilling and enables the battery to be positioned in any orientation. This flexibility can be highly advantageous when attempting to accommodate a significant power source within a confined space.