8 SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL
EN
For optimum charging results, the built-in charger requires a USB
power supply capable of at least 2-3A output. Using a power supply
with a lower output will result in very long charge times or the
transmitter not charging if it is powered on while attempting to charge.
The first time the transmitter is charged, the charge time may be
6-7 hours. Charge the transmitter when the low battery alarm
sounds. See the System Settings section for information on setting
the low battery alarm level.
Always charge the transmitter on a heat-resistant surface.
CAUTION: Never change the low voltage limit for Li-Ion
batteries below 3.3V. Doing so could over-discharge the
battery and damage both battery and transmitter.
CAUTION: Never leave a charging battery unattended.
CAUTION: Never charge the battery outside of the
transmitter. Charging the battery outside of the
transmitter may interfere with the battery monitoring system,
which can give false low battery warnings.
1. Connect a 2-3A USB power supply (not included) to an AC outlet.
2. Connect the included magnetic USB charging cable to the
power supply.
3. Insert the included magnetic USB-C adapter in the USB port
on the back of the transmitter.
4. Connect the USB charging cable to the magnetic adapter.
5. The power button will illuminate green while charging. A fast
press of the power switch will bring the battery charge status
icon to the display.
6. Charging is complete when the green light on the power
button goes out. Disconnect the USB cable once charging is
complete.
Disconnect the power supply from the power outlet.
The magnetic micro USB adapter can be left in the transmitter
USB port for future use.
CHARGING THE LITHIUM ION BATTERY PACK
CHARGING WARNINGS
WARNING: Failure to exercise caution while using this
product and comply with the following warnings could
result in product malfunction, electrical issues, excessive heat,
FIRE, and ultimately injury and property damage.
• NEVER LEAVE CHARGING BATTERIES UNATTENDED.
• NEVER CHARGE BATTERIES OVERNIGHT.
• Never attempt to charge dead, damaged or wet battery packs.
• Never attempt to charge a battery pack containing different
types of batteries.
• Never allow children under 14 years of age to charge battery packs.
• Never charge batteries in extremely hot or cold places or place
in direct sunlight.
• Never charge a battery if the cable has been pinched or shorted.
• Never connect the charger if the power cable has been pinched
or shorted.
• Never attempt to dismantle the charger or use a damaged charger.
• Always use only rechargeable batteries designed for use with
this type of charger.
• Always inspect the battery before charging.
• Always keep the battery away from any material that could be
affected by heat.
• Always monitor the charging area and have a fire extinguisher
available at all times.
• Always end the charging process if the battery becomes hot to the
touch or starts to change form (swell) during the charge process.
• Always connect the positive leads (+) and negative leads (–) correctly.
• Always disconnect the battery after charging, and let the
charger cool between charges.
• Always charge in a well-ventilated area.
• Always terminate all processes and contact Horizon Hobby if
the product malfunctions.
• Charge only rechargeable batteries. Charging non-rechargeable
batteries may cause the batteries to burst, resulting in injury to
persons and/or damage to property.
• The USB outlet shall be installed near the equipment and shall
be easily accessible.
CAUTION: Always ensure the battery you are charging
meets the specifications of this charger. Not doing so can
result in excessive heat and other related product malfunctions,
which can lead to user injury or property damage.
CAUTION: If at any time during the charging process the
battery pack becomes hot or begins to puff, disconnect
the battery immediately and discontinue the charge process as
batteries can cause fire, collateral damage and injuries.
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