NASA astronauts prepare for two spacewalks - CNN

Early Friday, NASA astronauts Chris Cassidy and Robert Behnken will conduct a nearly seven-hour spacewalk outside of the International Space Station to replace lithium ion batteries for one of the station's power channels. https://www.cnn.com/2020/06/24/us/nasa-spacewalk-cassidy-behnken-preview-scn-trnd/index.html