Advanced Bionics M Zn-Air CI-5501-120 Mode D'emploi page 16

With the tool inserted in the hole, gently push in and
downward until you feel the Zn-Air drawer release and pop
out the button of the Zn-Air cartridge. If you do not have
the tool present, any thin, pointed device should work to
release the drawer.
Set the tool aside. From here you can grasp the Zn-Air
drawer with your hand and gently pull it the rest of the way
out, so you are able to insert the Zn-Air cells.
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