one Shut down your computer system. Shut the lid and turn the laptop or computer upside down.
2 Slide the unlock tab over the left-hand side with the laptop or computer to the “Unlock” position. Very carefully slide the DVD drive from the bay.
three Slide the Ultrabay battery to the bay. The moment correctly seated, slide the tab to your “Lock” place.
four Turn your pc above and lift the lid. Press the electrical power button.