In some places the walls were so thin – the vehicle was designed to fly in a vacuum so only had to withstand being pressured to 5 psi – astronauts had to watch they didn't hit anything too hard.
What pressure was the lunar module?
During the Command Module extravehicular activities on the Apollo 15, 16, and 17 missions, use of the suit loop was required to support two crewmen, but no problems resulted and pressure regulation was within the required 24.1 to 27.6 kN/m2 (3.5 to 4.0 psia) range.
How was the lunar module powered?
Initially, the plan was to provide electrical power for the LM through a hydrogen fuel cell. In February 1965, after months of study, NASA approved a switch from fuel cells to batteries. ... The Command Module would continue to use fuel cells for electrical power because of its longer mission duration.
