Devices, systems and methods for a portable printer are provided. Personnel utilize features of the printer to manage products, store information on labels, and aid in shipping. A low battery shut-off feature shuts down the printer at a set battery power percentage; a battery charge control feature controls battery charging to stay within a set range of state of charge values to ensure longer battery life; a ribbon cartridge insertion feature allows for easy replacement of the ribbon cartridge; ribbon cartridge locating features lock the ribbon cartridge into place for printing; a ribbon guiding feature adjusts the ribbon during printing to reduce wrinkles; an RFID coupler mounting feature mounts and shields an RFID coupler inside the printer; a media guide locking feature fixes the media position to prevent misalignment; and a media alignment feature allows the user to properly align the media with the printhead during installation.