The PowerSafe DDm battery system provides long service life and excellent performance for a variety of applications that require large capacity valve-regulated batteries. The cell design of the DDm incorporates thick 0.25 inches positive plates for a long battery life of up to 20 years. The battery cells have welded epoxy, dual post seals that are 100% water bath tested in the factory. Lead-casted terminal posts include a large threaded copper insert that enhances the performance by maximum conductivity.