Disclosed herein are apparatuses, systems, methods, and machine readable media for activating a portable camera in response to the activity of a firearm, and for implementing and using a system for identifying an individual who discharged a firearm, and for recording, assessing, identifying, and transmitting information related to the firing of a firearm, and for monitoring the status of an implement at a mount, and for using a charging device for delivering electrical power to components of a firearm. A communications channel may be established between a firearm telematics sensor and a video camera, sometimes by means of intermediary devices. A communications channel may be established between a mount (e.g., holster) telematics device and local and/or remote monitoring service components, sometimes by means of intermediary devices. When the telematics sensor detects that its associated firearm is removed from its holster, or in motion, or being discharged, it may signal the camera to initiate recording. When the telematics device detects that its associated firearm is removed from its holster, the change in status can be reported to the local and/or remote system.