Dual Pro SS4 Auto 4 Bank Battery Charger w/2 Bank B.O.S.

Dual Pro SS4 Auto 4 Bank Battery Charger w/2 Bank B.O.S.

SS4 Auto 4 Bank Battery Charger with 2 Bank B.O.S. This kit includes Dual Pro s B.O.S. Battery Optimization System - 12V - 2-Bank (PN: BOS12V2) and Dual Pro s SS4 Auto 40A - 4-Bank Lithium/AGM Battery Charger (PN: SS4AUTO). B.O.S. Battery Optimization System - 12V - 2-Bank B.O.S. actively shuttles energy between batteries to keep the pack balanced, increasing battery strength and longevity. Batteries in a pack will become out of balance and the pack is onl