5
EN
Your UMX ASK-21 comes with a 1S 3.7V Li-Po
Battery Charger and a 1S Li-Po battery. You should
only charge your 1S Li-Po battery with a Li-Po
charger, such as the included charger or the E-fl ite
®
Celectra™ 4-port charger (EFLC1004).
Refer to the battery warnings. It is recommended
to charge the battery pack while you are inspecting
the aircraft. The fl ight battery will be required to
confi rm proper aircraft operation in future steps.
Please visit www.horizonhobby.com for optional
battery adapters.
Charging the Battery
The Battery Charging Process
1. 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.
2. Remove the cover on the bottom of the charger and install four of the included AA batteries, noting proper polarity.
Replace the cover after the AA batteries are installed.
3. Slide the battery into the slot on the charger. The end cap of the battery is specifi cally designed to allow the bat-
tery to fi t into the slot one way (usually with the label on the battery facing outward) to prevent reverse polarity
connection. However, check for proper alignment and polarity before proceeding to the next step.
4. Gently press the battery and its connector into the charge jack/connector located at the bottom of the slot in
the charger.
5. When you make the connection successfully, the LED on the charger turns solid red, indicating charging
has begun.
6. Charging a fully discharged (not over-discharged) 150mAh battery takes approximately 30–40 minutes. As the
battery nears full charge, the LED begins to blink.
7. When the battery is fully charged, the LED blinks approximately every 20 seconds or goes out entirely.
If the LED stays on when the battery is removed, the AA batteries in the charger are low.
8. Always unplug the 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 a Li-Po battery. Failure to do so could
result in fi re causing injury or property damage.
CAUTION:
Never exceed the recommended charge rate.
CAUTION:
Only use an E-fl ite 6V power supply (EFLC1005) with this charger. DO NOT use a 12V
power supply or property damage and injury could occur.
