Product Description Recombinant Gas - The RG® Series are low resistance, valve regulated lead acid (VRLA) batteries. Superior starting powerReliable essential power in the event of a generator failureLow impedance designMaintenance freeConstructed with non removable vent valves - no addition of electrolyte or water requiredAerobatic: Non spillable at any altitude or attitudeFactory tested to assure airworthinessShipped fully charged and ready to installManufactured with absorbed glass mat separators (AGM)The RG24-11M features a manifold to facilitate direct replacement of the originally designed manifold vented battery