A power control system for controlling operation of a battery-powered device positioned at a remote location from a camera, wherein the battery-powered device comprises one or more of a microphone, a temperature sensor, and a light emitting unit, wherein the microphone operate in conjunction with the camera for recording audio of the activities monitored by the camera, wherein the temperature sensor is configured to detect temperature of surroundings in case of temperature-sensitive operations of the camera, wherein the light emitting unit is configured to illuminate an area within the field of view of the camera, the power control system comprising: a receiving module configured to receive at least one of a pan angle and a tilt angle of a camera, wherein the at least one of a pan angle and a tilt angle is indicative of a field of view of the camera; a retrieving module configured to retrieve a position of the battery-powered device, wherein the position of the battery-powered device is predefined; a comparison module, in communication with the receiving module and the retrieving module, configured to: compare the at least one of a pan angle and a tilt angle of the camera with the position of the battery-powered device, and based on the comparison, determine whether the battery-powered device is positioned within the field of view of the camera; and a transmission module, in communication with the comparison module, configured to transmit instructions to activate at least one of a functional mode and a sleep mode of the battery-powered device, wherein the battery-powered device consumes less power in the sleep mode than in the functional mode, wherein the transmission module is configured to transmit an instruction to activate the sleep mode of the battery-powered device when the battery-powered device is not positioned within the field of view of the camera, and wherein the transmission module is configured to transmit an instruction to activate the functional mode of the battery-powered device when the battery-powered device is positioned within the field of view of the camera. a receiving module configured to receive at least one of a pan angle and a tilt angle of a camera, wherein the at least one of a pan angle and a tilt angle is indicative of a field of view of the camera; a retrieving module configured to retrieve a position of the battery-powered device, wherein the position of the battery-powered device is predefined; a comparison module, in communication with the receiving module and the retrieving module, configured to: compare the at least one of a pan angle and a tilt angle of the camera with the position of the battery-powered device, and based on the comparison, determine whether the battery-powered device is positioned within the field of view of the camera; and compare the at least one of a pan angle and a tilt angle of the camera with the position of the battery-powered device, and based on the comparison, determine whether the battery-powered device is positioned within the field of view of the camera; and a transmission module, in communication with the comparison module, configured to transmit instructions to activate at least one of a functional mode and a sleep mode of the battery-powered device, wherein the battery-powered device consumes less power in the sleep mode than in the functional mode, wherein the transmission module is configured to transmit an instruction to activate the sleep mode of the battery-powered device when the battery-powered device is not positioned within the field of view of the camera, and wherein the transmission module is configured to transmit an instruction to activate the functional mode of the battery-powered device when the battery-powered device is positioned within the field of view of the camera.