Today, Li-ion batteries are being utilized in a variety of energy-dense as well as power-dense applications. Under high rates of charge and/or low-temperature operations they often undergo deleterious reaction of Li metal deposition over graphite particles called Li plating. This leads to a significant drop in performance and lifetime of batteries. Due to a complex interplay of microstructural-electrochemical-thermal interactions, reliable non-destructive indicators of Li plating are still not well understood. Furthermore, the factors affecting the degree of reversibility of plated lithium and re-intercalation into the graphite electrode remain inconclusive. Herein an electrochemical-thermal model, incorporating Li plating and stripping reactions, is paired with experiments to study the underlying mechanisms that govern rest phase/discharge voltage profiles after a low temperature and/or high rate charge, and elucidating the reversible and irreversible Li plating. Factors such as graphite state of charge and Li plating morphology are found to influence rest phase behavior.