SD07-SA600E-D PrimePlus® 600lb STS Lifter The PrimePlus® 600lb weight capacity lift is your buildings answer for safely transferring residents. When used properly, the PrimePlus® lifts will reduce your overall cost and improve employee and resident safety. These STS lifts feature three types of control systems; Legacy, Performance, and Continuous Performance. These allow either battery pack operation only, battery pack with charging station and institutional grade control box, and a system with all the options including an additional wall mounted battery and charger for true continuous use.