EverLast C50-N18L-A 12V Conventional Battery with Acid Pack (8 1/16 L X 3 9/16 W X6 3/8 H) Heavy duty alloy Grid designed with Advanced separators to provide high Cranking power, longer life, and severe vibration resistance Through-the-partition connection creates greater Cranking power, additional vibration resistance, and reliable power Removable vent caps & "see-through" polypropylene cover allows for easy service while vent tube relieves excess pressure safely Sealed terminals & heat sealed cover protects against seepage, reduces corrosion, and extends battery life Dry-charged plates provide 70-80% state-of-charge when initially filled with electrolyte (acid). exact fill volume acid bottle included