Biofuel cells have a range of potential applications: - Medical Devices: They can be used to power implantable medical devices such as pacemakers, where conventional power sources are impractical. - Environmental Monitoring: Biofuel cells can be employed in sensors for detecting pollutants or monitoring environmental conditions. - Portable Electronics: Due to their small size and ability to use readily available biofuels, they are ideal for powering small, portable devices.