Space-walking astronauts are doing more battery replacement work outside the International Space Station.
NASA astronauts Christina Koch and Nick Hague floated outside the space station on Friday, a week after their first spacewalk installed new and stronger batteries for the space station's solar grid.
Koch was supposed to go out with astronaut Anne McLean, but there was not enough midpack.
So first-
Female space walks must be canceled.
A third spacewalk is planned in April 8, but it will also be a mix of men and women.
Nickel on the space station is out of date.
Replacing hydrogen batteries with lithiumion batteries.
These batteries store the power collected by the solar wing, which will remain in operation when the current whistle stands on Earth's night.
Hague and Koch arrived at the station two weeks ago.