Advanced Bionics M Zn-Air CI-5501-120 Mode D'emploi page 13

Remove the Zn-Air cells from their package, making sure
to remove the sticker from the flat positive (+) side of the
cell. Removing the sticker allows air to enter and activate
the battery, so be sure to use the battery immediately after
peeling off the sticker.
Place two Zn-Air cells, positive (flat) side up, in the two
openings in the battery drawer.
Once batteries are flush with the top of the battery drawer,
gently slide the battery drawer back into the battery
cartridge. If the cells are inserted incorrectly, the battery
drawer will not close.
11