Flat plate batteries have six sets of plates with glass mat separator containing the electrolyte are arranged in a straight line inside the battery. Because the plates are compressed in rows, the battery has more capacity, that is it uses all of the surface area inside the container to provide more energy when it’s needed. Plate compression enables longer life or more total energy usage over time. Provides further back-up protection from extraordinary, but unplanned, discharge events. A properly maintained lead acid cell can last up-to five years.