The deep cycle series battery is a lead acid battery designed to be regularly deeply discharged using most of its capacity. This kind of battery is designed to discharge between 45% and 75% of capacity, depending on different deep cycle battery suppliers, we provide China deep cycle batters to worldwide clients. Although deep cycle series battery can be cycled down to 20% charge, the best lifespan is to keep the average cycle at about 45% discharge. The typical deep cycle battery is 12V deep cycle battery. They can be used for various applications such as the deep cycle marine battery is applied in marine.