Because of the recent Soyuz MS-10 launch abort, this date of this activity is under review and will likely be postponed.
Expedition 57 astronauts are slated to venture outside the International Space Station to continue the replacement of the outpost's batteries that started in early 2017.
U.S. EVA-53 is expected to be the second of two planned spacewalks to replace the outpost's old nickel-hydrogen batteries with newer lithium-ion units. It will involve two Expedition 57 astronauts: The European Space Agency’s Alexander Gerst and NASA’s Nick Hague.
The spacewalking astronauts will replace the batteries on the P4 truss 2A power channel with units brought to the ISS inside the unpressurized section of the Japanese-built Kounotori 7 cargo ship. The spacewalk is expected to start at 12:05 UTC Oct. 25, 2018, and should last about 6.5 hours.
The old batteries will be placed in the spacecraft's unpressurized compartment for disposal in the northwestern Pacific Ocean at the end of Kounotori 7's mission.