Plug the cable into the new Li-ion battery gently and tightly.

To reassemble the laptop, follow steps 3~11 in reverse order. Some possible conditions and how to handle them will be described in the following steps.

NOTE: Make sure the cable is firmly inserted (the red box).

CAUTION: If the cable is not firmly inserted. Several worse conditions might happen. (1) Power failure (No electricity) and (2) Unstable connection cause an electric arc, fire, and explosion.

NOTE: Make sure the cable is securely fastened (red circles).

CAUTION: If the cable is not securely fastened. The cable might be squeezed by other parts, causing an unstable power supply and even safety issues (arc, fire, and explosion). REF: https://doi.org/10.31224/osf.io/swcyg