Advanced Bionics Sky CI M90 Mode D'emploi page 14

Slide the battery onto the sound processor until it clicks into place.
Do not force the battery onto the sound processor. The batteries are
designed to be inserted in only one direction; applying force may
damage the equipment.
Removing the Battery
Hold the Sky CI M90 in one hand. In the other hand, hold the battery.
Rotate the headpiece cable upward in order to avoid bumping it upon
battery removal.
Firmly slide the battery away from the M T-Mic, M Earhook, or M
Acoustic Earhook.
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