XS Power XP2500 XP Series 12V 2500 Amp AGM Supplemental Battery with M6 Terminal Bolt Ah: 100, RC: 185. 12V BCI Group 27 AGM Battery ax Amps 2,500A 12 Volt battery with Ah: 100, RC: 185 minutes Absorbed Glass Mat (electrolyte is suspended in fiberglass) Spill proof, sealed, valve regulated and vibration resistant Ultra low internal resistance Mount in almost any position