Video: Narrated preview of Jan. 13 spacewalk

Two space station astronauts carried out a trouble-free five-hour 58-minute spacewalk Friday, completing complex battery replacement work on the right side of the lab’s solar power truss with enough time left over to carry out a variety of lower-priority “get-ahead” tasks.

From the Johnson Space Center in Houston, officials from NASA brief reporters on two upcoming spacewalks outside the International Space Station to replace aging batteries in the outpost’s power grid.

Japan’s sixth HTV supply ship is slated to depart a picturesque spaceport on Tanegashima Island on Friday to start a four-day pursuit of the International Space Station with a cache of experiments, supplies and six lithium-ion batteries to begin overhauling the orbiting lab’s vast electrical system.