You can read about these different types in our full article on lead acid deep cycle batteries.ĭeep cycle Lithium-ion batteries are mostly very similar, but there are two specific types that differ in the materials used to make their cathodes (positive terminals). Within the SLA sub-category, there are absorbent glass mat (AGM) and gel batteries. Lead acid batteries can be further broken down into the categories of flooded lead acid (FLA) batteries, which require regular watering and maintenance, and sealed lead acid (SLA) batteries, which are maintenance-free. Image source: AA Portable Power Types of deep cycle batteriesĪs mentioned above, there are two basic kinds of deep cycle batteries that are commonly used today: lead acid and lithium batteries. ![]() ![]() Unless you’re buying raw cells to make your own battery, lithium batteries almost always come with an onboard battery management system (BMS).Ī lithium battery pack before being installed in an enclosure. Many of these cells are wired together to produce a battery pack, which is then encased in some sort of enclosure with positive and negative terminals on it. They use cylindrical cells with the electrolyte between two electrodes that control the flow of electrons. Lithium batteries are built a little differently, though. Lithium deep cycle batteriesĪll lithium batteries qualify as deep cycle batteries because they can be fully discharged and recharged. In addition, deep cycle lead acid batteries come in many sizes, because they don’t have to fit in the standard auto battery enclosure. This means the battery can’t draw a very high current through its terminals like the SLI battery, but instead can provide a steady stream of power, and its thicker plates help it avoid corrosion even when the battery is discharged. In contrast, a lead acid deep cycle battery has thicker metal plates. Some of Trojan’s deep cycle lead acid batteries for solar storage. This increases the surface area that’s in contact with the electrolyte, allowing the battery to draw lots of electricity at once. To do this, an SLI battery uses many thin metal plates connected to its terminals. In order to provide the very powerful burst of energy the starter motor needs, an SLI battery has to draw lots of electrons from its electrolyte solution. That’s why a car battery is also called a starting, lighting, and ignition (SLI) battery. Gasoline-powered cars use their 12-volt battery for three things: providing power to the ignition switch, activating and powering the starter motor, and running the lights. ![]() The difference between deep cycle batteries and car batteries Like car batteries, deep cycle batteries often use lead-acid technology, with lead plates connected to the terminals and suspended in an electrolyte solution containing sulfuric acid, but lithium batteries are becoming more popular. Although they come in many sizes, they mostly look like a standard 12-volt car battery, housed in heavy-duty rectangular boxes with positive and negative terminals on the top. Show more What is a deep cycle battery?Ī deep cycle battery is a battery that is meant to be charged and discharged regularly and can offer a steady stream of power while it discharges.
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