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Astronauts Perform Spacewalk to Swap Batteries

Astronauts performed their second spacewalk in under a week to replace old batteries outside the International Space Station, Wednesday, July 1.

NASA plans to send the astronauts out twice more in July to complete the battery swaps.

The new lithium-ion batteries should last for the rest of the space station's life.

This is the eighth spacewalk for both Commander Chris Cassidy and Bob Behnken. (AP)

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