Power Source; Troubleshooting - Xiaomi 70mai Owner's Manual

Power source

Your dash cam gets electricity from the cigarette lighter receptacle.
Use the original power cable and adapter to keep the input power
source steady. We shall not be responsible for any loss or damage
caused by using other power sources besides the cigarette lighter
receptacle, or using non-original power cables and adapters.
Some vehicles still supply power to the cigarette lighter receptacle
after the engine is off. To avoid your car's battery being used up,
long press the power button to power off your dash cam or pull out
the adapter from the cigarette lighter receptacle. Remember to power
the dash cam on when you start your next trip. We shall not be
responsible for any loss or damage caused by not powering the dash
cam off when you leave the car.
Battery
The built-in battery of your dash cam is only used for saving the
last video file when the external power source is cut off. Do not use
the dash cam without the external power source.
Do not remove the built-in battery by yourself.
Stop using the device and contact the after-sales service for help if
you encounter any of the following: the battery temperature is too
high; the battery is deformed; the battery expands; the battery
liquid spills; and any other abnormal cases involving battery.

Troubleshooting

Scenario Problem
Electrostatic
sticker falls
down
Installation
The adhesive on
the mount isn't
sticky
Solutions
Clean your windshield, attach the
electrostatic sticker to the glass, and
remove the air bubbles between the
sticker and the windshield.
Make sure the mount is attached to the
center of the electrostatic sticker, not the
edge.