First task was to prepare a worksite for new batteries that will be brought up on the STS-127 mission. They also installed a Global Positioning System antenna on the pressurized logistics module attached to the Kibo laboratory.

Moving one of the station's two Crew and Equipment and Translation Aid - or CETA - carts. With that work done, one of the carts was moved back to the station's port side, leaving a cart for use on either side of the truss.

The spacewalkers devoted their work again to lubricating the newly installed end effector and replacing cameras.