Install the battery:

1. Turn the knob and open the battery holder as shown in Step 1. 
2. Remove the rechargeable battery (11.1V 1050mAh 25C) and charge it using the supplied USB charging cable or the power adaptor as shown in Step 2 and Step 3. 
3. When charging, the indicator light on the USB charging cable will turn green and blink and will stay a constant green when the battery is fully charged. A full charge will take approximately 4 hours. 
4. After the rechargeable battery is fully charged, re-install it to the car as shown in Step 4. 
5. Replace the battery holder and turn the knob to secure it as shown in Step 5.