• Through-the-wall, welded intercell connectors are 25-percent larger than in other batteries, withstand vibration, and provide quick starts • Super radial grid design with inboard lug permits electrical current to flow more efficiently, and provides higher cranking amps • Extra-heavy plates give extra reserve power • Microporous plastic envelope separators eliminate electrical shorts and keep positive material from touching the negative plate • Epoxy-anchored plates make StrongBox batteries four times stronger than hot-melt anchored plates and reduce vibration. • Extra-Heavy straps create superior conductivity, strength, and durability for long battery life • Heavy cast grids for superior quality and durability that ensure long, trouble-free battery life • Flat-plate absorbed glass mat means no free-flowing electrolyte will leak from the battery • Six-valve isolated design allows gas to escape in the event of an overcharge without compromising seal quality • Through-the-partition intercell welding ensures ultimate conductivity and resistance to vibration.