Wyze Cam does not have a battery, so it needs be plugged into an external power source. Each camera comes with a 110V power adapter and a 6-foot USB power cord that can be plugged into a wall outlet or power bank. A 10000mAh power bank will power Wyze Cam for ~16 hours, and a 20000mAh power bank will power Wyze Cam for ~33 hours.
You can also use the power cord to plug one Wyze Cam into another to share the same power source. Simply plug the USB port end of the cord into the Wyze Cam connected to the power source, then plug the micro-USB port end of the cord into the second Wyze Cam.
Wyze Cam uses 5V 1A DC power through a micro USB port. You can use up to a 240V power converter with the camera. The power consumption is between 2-4 watts, depending on whether Night Vision is turned on.