What is deep cycle battery?

Deep Cycle battery is a kind of battery that focused on deep discharge and charge performance.
In the traditional concept, it usually refers to lead-acid batteries with thicker plates, which are more suitable for deep discharge cycling. It includes Deep Cycle AGM Battery, Gel Battery, FLA, OPzS, and OPzV battery.
With the development of Li-ion battery technology, especially LiFePO4 technology, the meaning of deep cycle battery extended. Due to its safety and super long cycle life, LFP battery is more suitable for deep cycle applications.