What must be ensured before electronic cells are removed for cleaning?

Before removing electronic cells for cleaning, it is essential to de-energize and discharge them. This process is crucial for ensuring safety and preventing accidental shocks or short circuits during the cleaning process. When electronic cells are powered, they can hold electrical energy, which may pose a risk if a technician inadvertently touches the terminals or connects the cells to a circuit while cleaning.

De-energizing the cells involves disconnecting them from any power source, and discharging them ensures that the stored energy is safely released. This step not only protects the technician but also helps prevent damage to the electronic components by minimizing the risk of static discharge or electrical shorts that could occur if the cells were cleaned while still live.

Other options suggest either cleaning cells thoroughly, replacing them, or not removing them at all. While cleanliness and maintenance are important, they cannot guarantee safety without first addressing the de-energization and discharging procedures.