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-[* black] Secondly, detach the battery case. (Use a flat-blade screwdriver)
-[* black] There is no battery inside the battery case, but there is a screw.
+[* black] Detach the battery case using a flat-blade screwdriver.
+[* green] Remove the 2x3 mm base screw on the back of the laptop using a T3 Torx screwdriver. The base screw is inside the battery case.