Answer:
The energy is released/harnessed in the form of an electrical current.
Step-by-step explanation:
The concept of a fuel cell is to harvest the energy of the H2 + O2 reaction in the form of electrical current, not as light, heat, and sound. Although energy in the light, heat, and sound provide a higher entertainment value, the electricity produced in a fuel cell proves useful in powering computers, electric cars, phones, televisions, toasters, and other electrical and electronic devices. The TV, phone, and computer provide substitute entertainment.
The amount of energy released is the same. It is simply in a different form.