What key factor should be monitored to ensure safety when working with large batteries?

When working with large batteries, monitoring for arc flash incidents is critical due to the high levels of energy and voltage involved in battery systems. An arc flash occurs when electrical current travels through the air between ungrounded conductors or a conductor and a ground. This can lead to explosive releases of energy, causing severe injuries and damage.

Proper precautions must be taken, including ensuring that all connections are secure, using appropriate personal protective equipment (PPE), and maintaining a safe distance from potential arc flash zones. Attention to arc flash hazards helps mitigate the risks of electric shock or burns that can happen during maintenance or operational activities involving large batteries.

While temperature gradients are important for the overall performance and longevity of batteries, and battery age can indicate potential failure or reduced capacity, they do not directly pertain to immediate safety in the same manner that awareness of arc flash incidents does. Hydration levels, while important for general safety and well-being, are not specifically relevant to the electrical hazards posed by batteries.