Even in space, batteries need to be replaced
(AP) -- Even in space, batteries need to be replaced.
The primary task of a spacewalk Wednesday will be to replace four batteries on one of the international space station's solar arrays. Astronauts David Wolf and Christopher Cassidy's spacewalk is scheduled be the third of Endeavour's 16-day mission to the orbiting outpost.
The solar array is used to generate power at the space station.
Other tasks planned for the 6 1/2-hour spacewalk include relocating a handrail on the outside of the space station and preparing experiments attached to a pallet that was brought up on Endeavour.
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