What guideline should be observed when working with a charged battery cell?

Using insulated tools is a critical guideline when working with a charged battery cell. This practice significantly reduces the risk of electrical shock or short circuits. Insulated tools have non-conductive handles that prevent current from flowing, thereby providing a safe barrier between the technician and the live electrical components. This is especially important in environments where batteries can carry significant voltage or current, which could lead to injury if contact is made with conductive materials.

The rationale behind this guideline is rooted in safety protocols found in electrical and biomedical equipment handling. Protective measures such as insulated tools ensure that technicians can perform their work without inadvertently creating paths for electrical flow that could result in dangerous situations.

In contrast, other practices, such as carrying the cell in your pocket or placing it on a metal surface, increase the risk of accidental discharge or shorts, while discharging the cell slightly before use does not necessarily offer a safety advantage and could impact its performance.