Transcription: The Lunar Module Direct Current Electrical System consists of three Silver Zinc primary batteries and one Silver Zinc backup battery. Power feeders from all primary batteries pass through circuit breakers to energize the Lunar Module's three DC buses. AC power is supplied by two inverters located in the ascent stage. During emergency situations, the LEM bus tie-line circuit allows the crew to reroute power to necessary systems that have been damaged or voltage starved.
(.mp3)