NASA astronaut Andrew Morgan works while tethered on the Port 6 truss

iss061e005535 (Oct. 11, 2019) --- NASA astronaut Andrew Morgan works while tethered on the Port 6 truss segment of the International Space Station to replace older hydrogen-nickel batteries with newer, more powerful lithium-ion batteries. The batteries store and distribute power collected from the station's basketball court-sized solar arrays directly behind Morgan.