Kinetik HC600 600 Watt Power Cell Car Audio Battery + Terminal Hardware - 2 Pack Kinetik HC600-Blu Power Cell 600 Watt 12V 18Ah High Current Power Cell. Pack of 2 Designed With More Plates For Stronger Energy Density Sealed Non-Spillable Design Can Be Mounted In Any Position Tightly Packed Cells That Provides Superior Heat &amp; Vibration Resistance AGM Technology For Better Power Efficiency, Longer Life and Maximum Sound Performance!