NASA Astronauts Chris Cassidy and Bob Behnken will make Friday’s planned spacewalk. They will upgrade the power system of the International space station (ISS).

it is Planned that the output will start at about 14:35 GMT. The astronauts will spend on the external surface of the station approximately 6.5 hours, RIA Novosti reported. During this time, Cassidy and Behnken will continue work to replace old batteries to the new lithium ion batteries.

aboard the ISS to help astronauts American Doug Hurley and Russian Ivan Wagner. The ISS is equipped with 48 batteries. To date, NASA has conducted the replacement of 36 of the 48 battery.

the Next spacewalk is scheduled on GMT on the first of July.