EN
5
A
B
The recommended battery for the E-fl ite Apprentice STS aircraft, included with the
RTF version, is an 11.1V, 3200mAh 3S 30C Smart Technology LiPo battery with an
IC3
™
connector (SPMX32003S30). If using a different battery, the battery should be of
similar capacity, dimensions and weight to fi t in the fuselage. The aircraft electronic
speed control is equipped with an IC3 device connector. Ensure the battery chosen
is compatible. Always ensure the model balances at the recommended center of
gravity (CG) with the chosen battery. Follow your chosen battery and battery charger
instructions to charge the fl ight battery.
RTF Smart Technology Battery and S120 Charger,
Specifi cations and Operation
The Spektrum S120 SMART Technology battery charger included with the RTF
version of the aircraft is compatible only with Spektrum SMART 2-3 cell LiPo
batteries or 6-7 cell NiMH batteries. It is not compaptible with any other battery
chemistries or non-SMART batteries.
A USB power supply is required for use. A USB-C QC type power supply is
recommended for the fastest charge times.
To charge the included fl ight battery:
1. Using the supplied Type-C USB cable, connect the S120 charger to a USB
power supply (not included ).
2. Insert the Spektrum SMART
Battery IC3 connector (A)
into the charger IC3 port, and
insert the battery balance
lead (B) into the charger
balance port. Both the IC3 and
balance connectors must be
connected for the charging
process to begin. The battery
may be disconnected from the
charger at any time
to stop the charging process.
IMPORTANT: SMART NiMH batteries do not have a balance connector.
3. Disconnect the IC3 and balance connectors when the charge and balance
cycles are complete, as indicated by the LED.
4. The LED indicator will glow solid red to indicate a charging error. Follow the
operation steps to ensure proper connection is used to charge the battery.
Refer to the LED indicator table for charger status.
IMPORTANT: Connecting a non-SMART battery will cause a charge error and the
S120 will not recognize or charge the battery.
S120 Specifi cations
Input USB Type C, power supply not included
Input Voltage 5V-12V
Charge Power 18W max (dependant on power supply)
Compatible USB Power Adaptor 5V/1A, 5V/2A, USB Quick Charge (QC) 2.0/3.0
Battery Connector IC3
™
and balance connector
Battery Types LiPo, NiMH (Spektrum SMART Batteries only )
Cell Count 2-3 cell LiPo, 6-7 cell NiMH
Max Output Voltage 13.05V
Max Output Current Up to 2A
LED Indicator
Power On
USB 5V: White LED
USB Quick Charge 2.0/3.0: Blue LED
LiPo: Purple LED
NiMH: Yellow LED
Battery Capacity
Less Than 25% Single Flash
25% – 75% Double Flash
76% – 99% Triple Flash
Charge Complete Green LED (Solid)
Error Red LED (Solid)
USB-C port LED Indicator
Balance Port
IC3 Charge Port
Charge the Flight Battery
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