This recommended practice covers the selection, sizing, installation design, installation, maintenance, and testing procedures that can be used to optimize the life and performance of energy storage devices and associated systems used in the starting of stationary engines. It also provides guidance to determine when such devices should be replaced. Energy storage devices and associated systems covered by this document include: - Batteries (lead-acid, nickel-cadmium) - EDLCs (supercapacitors) - Air-start systems - Start/control battery chargers - Parallel battery blocking diode systems ("best battery selectors") - Monitoring systems