Delivering power when you need it, Mighty Max RBC5 24V 7AH UPS Power Back Up Supply - Complete Battery Kit includes one series wire harness NOT CONNECTED. The Mighty Max RBC5 uses a state of the art, heavy-duty sealed lead acid batteries. The Mighty Max RBC5 Replacement Battery Pack is designed to replace the APC RBC5 UPS Systems and is designed for uninterrupted power during power outages and other disruptions to the main power supply.Please Connect Your Wire Harness Using The Wiring Harness Diagram.