NASA astronauts conduct spacewalk to upgrade battery & install cameras

WATCH: NASA astronauts conduct second spacewalk of the year

WATCH LIVE: NASA Spacewalk happening now

This establishment wraps up work to finish the substitution of maturing nickel-hydrogen batteries outside the station that started in January 2017.

This will be the fourth spacewalk for Mr Hopkins, who previously completed two spacewalks during his first six-month stay on the space station between September 2013 to March 2014.

Hopkins, Glover, NASA space traveler Shannon Walker and Japan Aerospace Exploration Agency space explorer Soichi Noguchi traveled to the station in November on board the SpaceX Crew Dragon Resilience space apparatus in mid-November. He previously completed two spacewalks during his first six-month stay on the International Space Station from September 2013 to March 2014.

Glover's own feelings about what it's like to embark on a debut spacewalk 250 miles above Earth will be fresh in his own mind as it took place just a few days ago.

IN SPACE - DECEMBER 21: In this handout photo provided by NASA, NASA astronaut Scott Kelly is seen floating during a spacewalk on December 21, 2015 in space.

Currently, the latest spacewalk is a wrap-up of some prior testing outside the space station that was being performed. Their tasks included installing a final lithium-ion battery and an adapter plate on the P4 truss segment, replacing three external high-definition cameras and performing several get-ahead tasks.

"Crew-2 also is expected to arrive at the space station to overlap with the astronauts that flew to the station as part of the agency's SpaceX Crew-1 mission", NASA wrote in a blog post.

The American astronaut, who has since completed two additional spacewalks, described his first one eight years ago as "a pretty emotional moment", adding, "It can be a little bit nerve-racking, and you're also very excited, right, because this is one of those events that you've dreamed about".

NASA will perform two further in around a month to prepare for more solar panels scheduled for launch later this year. The long-term aim is to substitute specific aging and unreliable battery packs with modern ones that carry more capacity and are more effective overall. The adapter plates are manufactured by Atec, and it provides heat to the lithium-ion batteries while on the JAXA HTV Exposed Pallet until they were transferred to the space station's truss for installation. Others were often short, eventually forcing subsequent spacewalks to make up for the missed time.

The International Space Station Twitter account announced the mission commenced successfully. It's probably that the launch will probably be livestreamed by NASA TV, so we'll maintain you up to date with all the main points on how to watch the launch as they grow to be out there.

The ISS uses batteries to store energy harnessed from the sun with its solar panels, and it taps into those reserves every time it doesn't have access to sunlight.

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