This document provides recommended practices for installation design, storage, installation, ventilation, instrumentation, charging, maintenance, capacity testing, and replacement of Li-ion (Lithium-ion) batteries. While the principles covered in this document apply to all stationary standby and cycling applications, some of them may be excessive for smaller systems, such as those often found in residential installations. This document also provides guidance on compliance to safety standards; as well as best practices for worker safety during installation, maintenance, and testing.