ParkZone PKZ3400 - Manual (Page 5)

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It is important that you only charge the included 3.7V 70mAh
Li-Po battery (PKZ3001) with the included 1S 3.7V DC Li-Po Charger
(PKZ3240). Attempting to charge the battery using another Li-Po charger
or non-Li-Po compatible charger could result in serious damage. Please
familiarize yourself thoroughly with the Battery Warnings and Guidelines
section before continuing.
To charge your ParkZone 3.7V 70mAh battery:
1. Install four of the included AA batteries in the charger base, noting
proper polarity.
2. Slide the battery into the charge slot on the charger.
3. Gently press the battery into the charging jack in the bottom of the
slot. The LED light on the base will turn solid red.
4. A nearly depleted battery will charge in approximately 20 minutes.
5. As the battery nears fully charged, the LED will begin to blink.
When fully charged, the LED will blink once every 20 seconds.
6. You can expect to be able to charge the flight battery about 15–20
times before it will become necessary to replace the four AA
batteries. Replacing with alkaline batteries will provide more
charge cycles.
Note: The Li-Po battery included with your Ember 2 will arrive
partially charged. For this reason the initial charge may only take
10–15 minutes.
Step 1 – Charging the Aircraft Battery