Power Acoustik CAPCELL 800 AMP Auxillary Power Delivery System Surge 800 amp x 3 seconds. 8 Amp/Hour rating 3-6 Year Cycle Life Digital Volt Meter and LED Display 16 Volts DC, 5 Milli-ohm Int. Resistance 7 h x 8.25 w x 6.5 l, Battery Post Terminals Surge 800 Amp X 8 Seconds .25-Inch Bolt Terminal .005Ohm 5 Amp/Hour 36 Year Cycle Life