To remove the battery, flip the laptop over and remove the 6 screws from the base cover. Bind and loosen the 2 screws at the back of the cover and gently pry the cover away from the hinges. Lift the base cover. Identify and unplug the battery cable. Find the battery and remove the 3 screws securing it to the system.
Lift and remove the battery and unlatch and disconnect the cable from the battery and the motherboard. To reinstall the battery, reconnect and latch the cable to the battery and the motherboard. Insert the battery back into the system and tighten the screws to secure the battery into place. Reconnect the battery cable to the motherboard and secure the base cover to the system with the screws.
To replace the base cover back on the laptop, align the base cover tabs to the slots and press the cover until it clicks into place. Tighten the screws that secure the base cover to the system.