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

iss061e005428 (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. Fellow NASA astronaut Christina Koch (out of frame) assisted Morgan during the six-hour and 45-minute spacewalk.