What function does the lithium ion containment bag serve during preflight checks?

The lithium ion containment bag plays a crucial role in enhancing safety during preflight checks, particularly in the context of managing potential fire risks associated with portable electronic devices (PEDs). This specially designed bag is designed to contain any fires that may occur due to battery overheating or malfunctions in these devices, effectively acting as a fire suppression tool.

When a battery experiences a failure, there is a risk that it could ignite, especially in a confined space like an aircraft. By placing the PED in this containment bag, any fire that does start is isolated, which helps to prevent it from spreading and affecting other cargo or passengers. The design of the bag often includes materials that can withstand high temperatures and may even have properties that help to smother flames.

The other options do not accurately reflect the purpose of the containment bag. It does not serve to hold personal items, recharge devices, or prevent smoke inhalation directly; rather, its primary function is focused on fire containment and suppression in the event of an emergency.