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Christopher John "Chris" Cassidy

 Total EVAs:  10
 Total EVA time:  54h 51m

No. Date Together with Time Main tasks and notes
 1  22.07.2009  D. Wolf  5h 59m
Preparing the exposed facility for experiment transfers and replace two out of the six batteries (four were planned) on the port side truss where they are housed to provide power for the truss.
 2  24.07.2009  T. Marshburn  7h 12m
Replacing the final four batteries on the port truss.
 3  27.07.2009  T. Marshburn  4h 54m
Removing covers from the Dextre robotic arm, reconfigure cables on a panel for some circuit breakers and deploy two additional payload attachment systems. They also installed a second camera that will provide video of experiments on the aft end of the exposed facility. Finally, they replaced an aging camera system on the starboard truss. Instead some get ahead tasks were completed which included installation of handrails and a portable foot restraint.
 4  11.05.2013  T. Marshburn  5h 30m
Inspection and replacement of a pump controller box on the station’s far port truss (P6) suspected of leaking ammonia coolant.
 5  09.07.2013  L. Parmitano  6h 07m
The astronauts replaced a space-to-ground communications receiver and wireless video equipment and installed power and cables for a Russian multipurpose laboratory module.
 6  16.07.2013  L. Parmitano  1h 32m
The spacewalk was terminated after just one hour due to an unexplained build up of water inside the space suit helmet of Luca Parmitano.
 7  26.06.2020  R. Behnken  6h 07m
It was the first in a series of spacewalks dedicated to replacing batteries on the far end of the station's starboard truss. The existing nickel-hydrogen batteries were upgraded with newer, more powerful lithium-ion batteries.
 8  01.07.2020  R. Behnken  6h 01m
The duo continued to replace nickel-hydrogen batteries with more powerful lithium-ion batteries (working site: S6 Channel 1B battery R&R A-F). In addition they routed communication cables.
 9  16.07.2020  R. Behnken  6h 00m
The astronauts continued to replace nickel-hydrogen batteries with more powerful lithium-ion batteries (working site: S6 Channel 3B battery R&R A-F). They removed all six older nickel-hydrogen batteries for the truss' power system and installed three new lithium-ion batteries.
 10  21.07.2020  R. Behnken  5h 29m
Their first task was to install a protective unit to store tools for use by the Canadian Space Agency's Dextre robot. The astronaut duo then worked on removing two lifting fixtures, prepared the outside of the Tranquility module for the arrival later this year of the Nanoracks commercial airlock, routed ethernet cables and removed a lens filter cover from an external camera.