This paper describes the performance of LiMnO2, rechargeable AP, batteries developed at Tadiran. The advancement, achieved recently in this technology in terms of cycle life, capacity, energy density, low-temperature performance and high discharge currents, is presented. In spite of the use of lithium metal as the anode and liquid electrolyte solutions, these cells are considered safe due to their internal safety mechanisms based on polymerization of the solvent 1,3-dioxolane, in abuse cases.