Extended duration lunar missions require survival of lunar night, which approaches temperatures of -180C. The utility of night survival means another 14 earth days of mission. Critical to operation upon revival is the battery. Common batteries use an aqueous electrolyte which ruptures cell chemistry when subjected to cryogenic temperatures. Development of a lithium-iron-phosphate battery pack enables revival after cryogenic freeze. The prototype in this video shows a micro-controller to initiate wakeup of a flight computer upon temperature trigger, which is sensed by the micro-controller. This function is critical for boot-up of systems that endure lunar night. This system is more fully described in the video.