Retevis RB27, User Manual

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• Medium Range: Partial Obstruction to line of sight.
• Short Range: Major Obstruction to Ling of Sight.
Optimum Conditions are:
• Over water
• Open rural areas without obstructions
• Flat areas where you can see the other person
To ensure you get maximum range:
• Be sure to use fresh or fully charged batteries - low batteries will cause low power conditions.
• Be sure you are on a GMRS channel - FRS channels are restricted by the FCC to low power.
• Be sure to set your radio to use Hi power.
2. BATTERY INFORMATION
2.1 Charging the Battery Pack
The Li-ion battery pack is not charged at the factory; please charge it before use. Charging the battery pack for the
first time after purchase or extended storage (more than 2 months) may not bring the battery pack to its normal
maximum operating capacity. Best operation will require fully charging/ discharging the battery two or three times
before the operating capacity will reach its best performance. The battery pack life may be depleted when it’s
operating time decreases even though it has been fully and correctly charged. If this is the case, replace the
battery pack.
2.2 Charger Supplied
Please use the specified charger provided by RETEVIS. Other models may cause explosion and personal injury.
After installing the battery pack, and if the radio displays low battery with a voice prompt, please charge the
battery.
2.3 Use Caution with the Li-ion Battery
a. Do not short the battery terminals or throw the battery into a fire. Never attempt to remove the casing from the
battery pack, as RETEVIS cannot be held responsible for any accident caused by modifying the battery.
b. The ambient temperature should be between 5
℃
-40
℃
(40˚F - 105˚F) while charging the battery. Charging
outside this range may not fully charge the battery.
c. Please turn off the radio before inserting it into the charger. It may otherwise interfere with correct charging.
d. To avoid interfering with the charging cycle, please do not cut off the power or remove the battery during
charging until the green light is on.
e. Do not recharge the battery pack if it is fully charged. This may shorten the life of the battery pack or damage
the battery pack.
f. Do not charge the battery or the radio if it is damp. Dry it before charging to avoid damage.
WARNING !
When keys, ornamental chain or other electric metals contact the battery terminal, the battery may become
damage or injure a human. If the battery terminals are short circuited it will generate a lot of heat. Take care when
carrying and using the battery. Remember to put the battery or radio into an insulated container. Do not put it into
a metal container.
2.4 How to Charge
Your radios include a charging cradle and battery packs. Follow these instructions to recharge your radios.
Make sure to turn the radio OFF before placing the radio in the charging cradle.
1) Connect the adapter's plug to DC IN 10V jack of the charging cradle and plug the other end into an AC outlet.
2) Set the charging cradle on the desk or tabletop and place the radio in the charging cradle with the keypad
facing forward.
3) Make sure that the LED illuminates. Charge the battery pack for 6 hours and remove the radio from the
charging cradle after charging.
Note:
• Use only the supplied battery and AC adapter or approved accessories from pofung.
• Charge time may vary depending on the battery life remaining.
• The battery must be installed for the unit to operate, even if the unit is also connected to external power.
• If battery power is low, you cannot operate the radio even using external power. Allow the battery to charge
before using. If you try to transmit while power is low, the radio will automatically turn off.
• For fastest charging, turn off the radio before charging.
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