Lectrosonics MM400c - Manual (Page 10)

MM400C
LECTROSONICS, INC. 10
WARNING: Do not open battery compartment
if unit is wet. Read “Preventing Internal
Corrosion” on page 8 before proceeding.
The transmitter is powered by a standard lithium, NiMH
or alkaline AA 1.5 volt battery. The battery status
circuitry is designed for the voltage drop over the life of
lithium batteries. While NiMH rechargeable batteries
will work, they run down quite abruptly. Because of this,
using the PWR LED to verify battery status not reliable
with NiMH batteries. It is possible to track battery status
using the Battery Timer function available in a num-
ber of Lectrosonics receivers. (Refer to your receiver
manual to determine if this function is available.
Alkaline batteries provide about 1.75 hours of operation
with some warning. Lithium batteries can be used to
provide over 6 hours of operation and provide about 30
minutes of warning as the LED turns red.
Note: Standard zinc-carbon batteries marked
“heavy-duty” or “long-lasting” are not adequate.
To access the battery compartment, unscrew and
remove the Battery Compartment Cover. Take note of
the polarity marked on the battery case showing the
location of the positive (+) and negative (-) terminals.
The positive (+) battery terminal goes into the transmit-
ter first. Screw the Battery Compartment Cover back
into the transmitter body. If the battery is inserted incor-
rectly, the cover will not screw in easily and the unit will
not work.
Battery Installation
Battery Compartment