HP f870x - Using Cars Battery with ACC Cable Connected; Connect with Power Bank

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3.5.2 Using car’s battery with ACC cable connected.
 Motion Detection:
- In normal loop recording mode, press and hold POWER for 3
seconds, The screen will show message “ Press OK to power off
or enter Motion Detection after 10 sec. ”
- To disable this function, press any key to wake up the screen,
and resume to normal loop recording; or when the car engine is
started again, manually power off and power on the car
camcorder, it will be back to normal loop recording.
 Vibration Detection:
- Not available for this function
3.5.3 Connect with power bank
 Motion Detection:
- In normal loop recording mode, unplug car adapter and connect
power bank, press and hold POWER key for 3 seconds, The
screen will show message “ Press OK to power off or enter
Motion Detection after 10 sec .”
- To disable this function, press any key to wake up the screen,
and resume to normal loop recording; or when the car engine is
started again, unplug the power bank, and connect car adapter, it
will be back to normal loop recording.
 Vibration Detection:
- Not available for this function