Why is maintaining a minimum ECB battery percentage critical during flight?

Maintaining a minimum ECB (Electronic Circuit Breaker) battery percentage during flight is essential for the operation of electronic flight bags (EFBs), which are critical tools for modern aircrew. EFBs support flight operations by providing access to flight plans, charts, and other vital information that pilots need during all phases of flight. If the battery percentage falls below the minimum threshold, it can lead to the malfunction or complete shutdown of the EFB, which could cause delays in accessing important flight data or hinder the crew's situational awareness.

While communication systems, navigation systems, and safety regulations are undeniably important, the specific context of maintaining ECB battery life primarily relates to the operational readiness of EFBs. Thus, ensuring that these devices remain operational throughout the flight by monitoring battery levels is a crucial aspect of flight safety and efficiency.