Phonak iCube II User Manual page 9

iCube II charging station is available as an option
Battery notes
When charging your iCube II for the first time, leave
it to charge for at least three hours (even if the
battery indicator light changes to green color earlier).
Charging an empty battery will take approx. 2 hours.
It is safe to leave iCube II connected overnight.
A new battery's full performance is achieved only
after two or three complete charge and discharge
cycles.
The iCube II battery can be charged several hundred
times. If the operating time of your iCube II reduces
substantially, please contact your local Phonak
representative.
For safety reasons, recharge the battery only with
chargers supplied by Phonak.
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