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3
BATTERY CHARGING
About the optional battery case
The BC-273 uses three AA (LR6) size alkaline
batteries�
1� Remove the battery case top as shown below�
2� Install three AA (LR6) size alkaline batteries�
L Install only alkaline batteries�
L BE SURE to observe the correct polarity�
3� Attach the battery case� (p� 1-2)
BP-273
D Batteries cautions
• When installing batteries, confirm that they are
all the same brand, type and capacity. Do not mix
new and old batteries together�
• DO NOT incinerate used battery cells since the
internal battery gas may cause them to rupture�
• DO NOT expose a detached battery case to
water. If the battery case gets wet, BE SURE to
wipe it dry before using it�
• DO NOT use batteries whose insulated covering
is damaged�
• Keep the battery terminals clean� It's a good idea
to occasionally clean them�
• Remove the alkaline batteries when battery case
is not used� Otherwise the installed alkaline
batteries will exhausted due to the built-in step-up
converter�
TIP:
• A built-in step-up converter in the BP-273
increases the voltage to 5�5 V DC� Approximately
100 mW of output power is possible using the
case. Also, the transmit output power selection is
disabled�
• The transceiver meets IPX4 requirements
for waterproof protection when the BP-273 is
attached�
• The batteries may seem to have low capacity
when used in low temperatures, such as –10°C
(+14°F) or below. Keep the batteries warm in this
case�
Alkaline battery
D Battery life
The approximate battery life (operating time) as
shown below is calculated under the following
assumptions:
• Power save setting: Auto (Short)
• Duty cycle: TX : RX : Stand-by = 1 : 1: 8 (based on
operating style)
The approximate battery life:
FM mode
8 hours
L The battery life may differ, depending on your
operating style, or the installed alkaline batteries.
D About the battery replacement
When the alkaline batteries are almost exhausted,
"LOW BATTERY" is displayed and the battery icon
starts to blink. After 10 seconds, the transceiver power
is automatically turned OFF. In that case, replace all
batteries with new alkaline batteries�
L The battery icon for the BP-273 cannot display the
capacity of the alkaline batteries� The battery icon
always displays "
the true battery capacity�
3-4
DV mode
6�5 hours
," and it does not reflect with
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