E-flite UMX Yak 54 180 BNF - Manual (Page 5)

5
EN
Your aircraft comes with a 2S 7.4V 150mAh 45C
Li-Po battery and a 2S 7.4V DC Li-Po battery
charger that requires a 12V (11V–14V) DC power
source.
Refer to the charging warnings. It is recommended
to charge the battery pack while you are inspecting
the aircraft. The flight battery will be required to
confirm proper aircraft operation in future steps.
Battery Charging Process
NOTICE: Charge only batteries that are cool to the
touch and are not damaged. Look at the battery to
make sure it is not damaged e.g., swollen, bent,
broken or punctured.
1. Gently press the battery connector into the
charge port located on the front of the charger.
The connector of the battery is specifically
designed to allow it to fit into the charge port
one way to prevent reverse polarity connection.
However, check for proper alignment and
polarity.
2. Press the button on the charger. The red LED
will illuminate, indicating charging has begun.
Charging a fully discharged (not over-discharg-
ed) 150mAh battery takes approximately 20–30
minutes at the charger’s 300mA charge rate. The
included battery can be charged at a rate of up to
3C (600mA).
Always disconnect the fl ight battery from the
charger immediately upon completion of charging.
CAUTION: Overcharging a battery can cause
a fi re.
CAUTION: Only use a charger specifi cally
designed to charge this Li-Po battery. Failure to do
so could result in fi re, causing injury or property
damage.
CAUTION: Never exceed the recommended
charge rate.
LED Indications
1. Green LED blinking .......................................................................................... Standby
2. Blinking Red LED at varying speeds ................................................................. Charging
3. Red and Green LED blinking simultaneously ..................................................... Balancing
4. Solid Green LED ............................................................................................... Full Charge
5. Red and Green LED fl ashing rapidly ................................................................. Error
Battery Charging
2S 7.4V 150mAh 45C
Lithium Polymer Batter
y