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Astronauts Install Fresh Batteries On Spacewalk 4

In this image rendered from video and released by NASA, the space shuttle Endeavour is shown as it approaches the international space station before docking Friday, July 17, 2009.  The KIBO lab section of the space station is shown at bottom. (AP Photo/NASA TV)

In this image rendered from video and released by NASA, the space shuttle Endeavour is shown as it approaches the international space station before docking Friday, July 17, 2009. The KIBO lab section of the space station is shown at bottom. (AP Photo/NASA TV)

CAPE CANAVERAL, Florida -- The international space station is sporting fresh batteries, thanks to an extra-long spacewalk.

The astronauts moved slowly and even loitered at times to avoid a repeat of the suit trouble that had cut short the previous outing.

Despite their dawdling pace, Christopher Cassidy and Thomas Marshburn managed to install all four new batteries during Friday's 7-hour, 12-minute spacewalk.

For the second spacewalk in a row, Cassidy ended up with rising carbon dioxide levels in his suit. But the problem did not crop up until the battery work was complete.

The last time Cassidy went out, on Wednesday, he was so gung-ho and moved so fast that the air-cleansing canister in his suit could not keep up.

That resulted in rising carbon dioxide levels that forced an early end to that spacewalk.


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