Aperture Labs had core rechargers wirelessly connection to cores, but as Wheatley went to space his core battery will eventually die. He had to redirect himself to the labs before he was deactivated, luckily space core already died and floated into the sun. (After 30 years of aimlessly floating, a rocket hit it at over 30,000 MPH) GLaDOS had set up a core announcment system, GLaDOS had sent to every core in the Aperture Core network the message "Chell has returned and is now in statis." As Wheatley read this, he quickly was to activate emergency solar panels, his battery recharged itself as he smashed down like a meteor into the laboratories, he smashed straight into the central core chamber...