The PS-6580 F2 batteries feature: • Absorbent Glass Mat (AGM) technology for superior performance. • Valve regulated, spill proof construction allows safe operation in any position. • Power/volume ratio yielding unrivaled energy density. • Approved for transport by air. D.O.T., I.A.T.A., F.A.A. and C.A.B. certified. • U.L. recognized under file number MH 20845. • CE certified.