Rechargeable batteries needed for military applications face critical challenges including performance at extreme temperatures, compatibility with military logistical processes, phasing out of legacy battery technologies, and poor compatibility of COTS lithium-ion batteries with specialized military operational requirements and legacy platforms. To meet these challenges, CAMX Power has developed and is commercializing a lithium-ion battery technology, trademarked CELX-RC®, with high power and rapid charging capability, long life, exceptional performance and charge acceptance capability at extreme low temperatures (e.g., -60 ºC), excellent safety, capability for discharge and storage at 0V, and ability to be implemented in batteries without management systems. This paper describes CELX-RC technology and its implementation in prototype batteries.