Deep cycyle technology battery. Has a very long life span. It is a rugged and durable battery with a very low self discharge. It is suitable for both pure sine wave and modified sine wave inverters as well as for solar applications.Deep cycyle technology battery. Has a very long life span. It is a rugged and durable battery with a very low self discharge. It is suitable for both pure sine wave and modified sine wave inverters as well as for solar applications.