The Drift Camera can be used with an external power supply, but it will not charge the battery and record at the same time. To charge the battery the camera needs to be turned off. If you run the camera on a power supply it is recommended to charge the battery first, this way it can act as a back up in case the power supply becomes disconnected for any reason. Below are some notes from page 12 the Drift User Manual:
Charging the battery
The Drift HD comes with a rechargeable Lithium-Ion battery which can be charged with the included USB cable. Socket-to-USB adapters can be used as well.
Ensure the battery is in the camera and the unit is powered off.
Insert the smaller end of the USB cable into the USB mini slot inside the camera.
Attach the other end of the USB cable to a USB port in your computer, or to a USB power adapter (not included).
If charging via a computer, the LED will turn blue and the screen will go black. When charging via a USB power adapter or a USB cigarette lighter adapter, the camera should be switched off, or the battery will not charge.
To charge the camera, press and hold the SELECT button for 3 seconds. The screen will turn off and the LED will turn blue, to indicate charging is in progress.
Once the camera is fully charged, the LED will turn off. Remove the USB cable and close the rear hatch. It takes around 2½ hours to be battery to be fully charged.
Note: Remove the battery if the camera is not going to be used for an extended period of time.
Note: Take care not to damage the waterproof seal when replacing the remote battery.
Note: If the LED is does not turn blue, the battery is not charging. Please follow the above instructions carefully to ensure that the LED turns blue and the battery does actually charge.
Note: When charging the camera with a USB cable via a Mac, you may get an error message about an incorrectly removed external device. This error message can be safely ignored.
Note: The battery needs to be fully charged before its first use.
At a temperature of 25°C (77°F), with all power saving features switched off, with the LCD switched on and the camera recording continuously, the battery will last for about 1h45m on a full charge.
In very cold conditions like -5°C (23°F), with all power saving features switched off, the LCD switched on and the camera recording continuously, the battery will last for considerably less time on a full charge.
Note: Please see the Conserving Battery Life section on page 19 for details on how to make the battery last longer.
Using an External Power Supply
The Drift HD can be powered by an external power supply such as a USB power adapter, a battery kit or a cigarette lighter adapter. We do recommend you to power off your camera before plugging your camera to any external power supply.
Note: Plugging an external power supply into the camera does not recharge the battery unless you put the camera into charging mode (page 11).
The battery will not charge when the camera is switched on.
If the external power is cut off during recording (e.g. if the cigarette lighter adapter comes loose), the camera will immediately start drawing power from the rechargeable battery instead and continue recording, protecting your footage from file corruption.
Note: This feature will only work if the battery is charged. If using your camera with an external power supply, we recommend charging the battery beforehand to ensure your files are protected.