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Spacewalking Astronauts Tackle Battery Work Outside Station

Astronauts went spacewalking Friday to hook up fancy new batteries on the International Space Station's sprawling power grid. Before venturing out, Commander Shane Kimbrough and Peggy Whitson got a hand from a robot that took care of most of the grunt work. Remotely using robotics aboard the 250-mile-high lab, flight controllers in Houston spent the past week replacing decade-old, nickel-hydrogen batteries with better charging lithium-ion ones. Handling all those batteries — each...

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