To remove the two cell battery. Loosen the 8 screws on the base cover. Pry the cover away from the recess points near the hinges. And lift the cover up. Identify the battery cable. Use the pull tab to disconnect the battery cable from the connector on the system. Loosen the 5 screws securing the battery. Lift the battery out of the system with the cable. Carefully push the battery filler downwards to remove it from the two-cell battery.
Remove the latching tape. Flip the battery over. Disconnect the battery cable from the connector on the two cell battery. To reinstall the two cell battery, reconnect the cables on the battery connector. Flip the battery over. Retape and reinstall the latch. Carefully push the battery filler upwards to attach it to the two cell battery.
Place the 2-cell battery along with the battery cable. Tighten the 5 captive screws to secure. Connect the battery cable to the connector on the system board. Put the base cover on the system. And tighten the eight screws.