Are hydrogen fuel cells currently being used on any appliances?

In addition, I would add that in order for fuel cells to be feasible for household appliances, there would need to be 1) a consistent source of hydrogen fuel, which there currently isn't other than in some places for car refueling, and 2) a decrease in the cost of hydrogen fuel cells, as they are currently quite expensive. I have heard of some applications for hydrogen fuel cells in heating because they can occasionally use the same system as natural gas.

In my opinion, biofuel has a far greater chance of being practical for use in automobiles and home appliances since it is probably easier to produce, more affordable, and more effective.

Yes, hydrogen fuel cells are currently being used in various appliances, including vehicles, backup power systems, and portable electronic devices. In vehicles, hydrogen fuel cells are used to power electric motors, providing an alternative to traditional internal combustion engines. Additionally, fuel cell backup power systems are utilized in telecommunications, data centers, and remote off-grid locations. Some portable electronic devices, such as laptops and smartphones, also use small hydrogen fuel cells as power sources.