Xiegu X5105 QRP Transceiver
5
The X5105 comes with a built-in 3800-mAh battery pack. When no external power source is connected to the
power jack, the battery supplies power to the radio. When a power source is connected, the radio senses the
external voltage and switches over to it.
Charging Procedure:
You may listen to the X5105 while it is charge mode -- but avoid transmitting while
charging is taking place. The combined current required to simultaneously transmit and charge the Lithium
ion cells could exceed the capacity of the radio’s power-management components. To initiate a charge cycle
while the radio is operating:
Scroll to Menu-7, select [CHG] (charge), then select CHG ON (charger on).
To ensure a full charge, apply at least 13.5 volts from the external power source (normal charge range is
13.5–14.0 volts). Charging begins automatically and is monitored by the charge controller.
The maximum charge time required for a fully depleted battery is 12 to 15 hours. When the battery is fully
charged, the charge controller automatically terminates the charge cycle.
When your radio is turned off with external power connected, the battery automatically recharges, as needed,
to restore a full charge.
When battery power is nearly depleted, the battery symbol located at the upper right corner of the display
screen will appear to be “empty” . At this point, you should switch to an external supply or recharge the
battery right away. Note that during the recharge cycle, it is normal for the X5105 heatsink and case to
become slightly warm. Normal life span for the internal battery is about three years. Contact MFJ Enterprises
to order a replacement when you observe a significant drop in capacity or if the battery fails to hold a charge.
Note that routine battery replacement is not covered under warrantee.
IMPORTANT OPERATING WARNING: DO NOT
abruptly disconnect the power supply when the X5105 is
connected to an external power source and the radio is transmitting. Doing so can damage the radio’s
power-management components. Also, avoid transmitting while simultaneously charging the battery.
IMPORTANT BATTERY WARNING:
Lithium-ion batteries are widely used in electronic devices and the
technology is safe. However, in rare isolated cases, Lithium ion batteries have been known to fail internally
and overheat. Should such a failure occur involving the battery in your X5105, the radio’s enclosure would
likely become extremely hot to the touch. In this event, disconnect the radio’s external power source and
immediately remove the radio to a well-ventilated flame-resistant area. After the case cools down, contact
MFJ with a detailed description of the event and request specific handling instructions.
