After the LED stip is removed

Remove the eight (Phillips 0) screws.

NOTE the top right screw is behind a warranty sticker.

Once the screws are removed, gently separate the front and back cases using a Pick or opening tool or similar.

CAREFUL when separating the cases, the battery module is loose once they separate and secured only by it's cables that you won't want to damage.

The second photo shows the back/inner case above the front/outer case still containing all parts for the module and the battery sitting loose.