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tamper-resistant battery door (optional)
A special battery door may be installed with your hearing instrument which protects
against unintended operation of the battery door and battery.
This is strongly recommended for infants, small children and people with learning
difficulties.
The battery door is designed only to be opened by using a tool. Use a small screwdriver
to open the door by inserting it into the indent on the door side and then tip it.
