|astronautix.com||All-battery electrical power system for the Apollo LEM|
Grumman presented to MSC its recommendations for an all-battery electrical power system for the LEM:
MSC requested that Grumman evaluate the possibility of furnishing power for the pre-separation checkout of the LEM wholly from that module's power supply. This procedure would obviate the CSM's supplying that power during the initial 60 min of the checkout. This would simplify the electrical connections between the two spacecraft and eliminate the possible requirement for an additional battery charger in the CSM. The Center advised North American, however, that such a charger might still be needed on Block II CSMs. References: 16 .