Lectrosonics UT400 - Manual (Page 14)

UT
Battery Installation
The transmitter is powered by a standard alkaline or
lithium 9 Volt battery. Alkaline batteries will provide
about 3.5 hours of operation while the lithium batteries
will operate the transmitter for about 6.5 hours.
Note: The battery status lamp will function normally
only with alkaline or lithium batteries. Standard
zinc-carbon batteries marked “heavy duty” or “long­
lasting” are not adequate. They will provide only
about 30 minutes of operation.
NiMH rechargeable batteries will work, but they run
down quite abruptly. Because of this, using the Power
LED to verify battery status not reliable with NiMH bat­
teries. However, a number of Lectrosonics receivers
incorporate a Battery Timer function which tracks the
amount of time the transmitter signal is detected (See
your receiver manual to determine if this function is
available.) By using the receiver’s battery timer and re­
placing the transmitter battery before the premeasured
time is up, users can minimize potential loss of audio
when NiMH batteries are used.
The battery compartment is located in the lower sec­
tion of the transmitter, between the two printed circuit
boards. Follow the steps illustrated to the right to install
a fresh battery.
Note the two differently sized holes in the battery
contact pad inside the Battery Compartment. Insert
the battery so that the large hole in the battery contact
pad will line up with the large contact on the battery. A
spring-loaded plunger in the bottom of the compartment
(opposite the contact pad) secures the battery in place.
The battery status is indicated by the Power LED on the
bottom panel. The Power LED glows green when a new
battery is installed, then changes to red as battery con­
dition deteriorates. It begins blinking red as the battery
nears depletion. Battery status is also displayed on the
front panel LCD of some Lectrosonics receivers. See
the associated receiver manual for further details.
Note: It is possible to insert the battery backwards
and still be able to close the battery door. No
damage will occur but the transmitter will not
operate in this condition.
LECTROSONICS, INC. 14