The answer depends on the model of your camera.
Applies to: All Reolink cameras and NVRs.
Reolink battery-powered cameras
The power adapter is not included in each package of camera, so you need to purchase a 3rd party adapter. Be sure that the ratings of the power adapter of Reolink battery-powered cameras should be DC 5V 2A.
Reolink POE cameras
The power adapter is not included in each package of the camera, but you can also purchase a 3rd party adapter. For Reolink RLC-423, RLC-423S, and RLC-823A, the ratings of the power adapter should be DC 12V 2A. For other Reolink PoE camera models, the ratings of the power adapter should be DC 12V 2/1A.
Reolink WiFi cameras:
The power adapter is included in each package of the camera. Here is a picture to show you what a DC adapter may look like. You can also purchase a 3rd party adapter with the ratings of DC 12V 1A.
Reolink NVRs
The power adapter is included in each package of the NVR, but you can also purchase a 3rd party adapter. Be sure that the ratings of the power adapter of Reolink PoE NVRs (16 channel) should be DC 48V 2.5A, Reolink PoE NVRs (8 channel) should be DC 48V 2A, and Reolink NVRs(36 channel) should be DC 12V/5.4A , the ratings of the power adapter of Reolink WiFi NVRs should be DC 12V 2A.