When your FineTuner generates an optical battery low warning signal (see also Chapter 5, OPUS 2
speech processor, FineTuner, FineTuner functions), it is recommended to replace the battery of
your FineTuner.
Open the lid on the back of the FineTuner with a small screwdriver.
Replace the used button battery (type CR2025) by removing it with the coil magnet or by
gently shaking it into your hand. Try not to touch the battery contacts.
Insert the new battery with the “+” sign facing up.
Close the lid by carefully inserting it on the right side, then sliding it in place and tightening
the screw.
Fig. 17 Changing the battery of your FineTuner
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