Specifications

9
Changing batteries
When the battery voltage/power decreases to
a certain level, the instrument will emit a soft
beeping signal.
This signal will continue for about one minute,
and the sequence will continue every five
minutes until the instrument will be auto-
matically switched off. It is therefore advisable
to keep an extra battery at hand.
Open the battery compartment completely
by using your fingernail. The end of the
cleaning brush is magnetic. Use this for
easy battery removal and insertion.
The replacement battery has to be a
zinc-air battery or an appropriate Nickel
Metal Hydride rechargeable battery.
Size depends on your instrument:
Instrument type Battery size
Mini-BTE 312
BTE 13
Power BTE 13
Remove the protective seal from the fresh battery and insert it in the
battery door. Check that the + symbols on the battery and on the
battery door are on the same side.
Always insert a battery in the opened door, never directly into the
instrument.
Close the battery door. This should go smoothly, so never force it
as this could damage your instrument.
open battery door completely
exchange battery