The Battery Condition Annunciator App is the first-of-its-kind mobile application designed to address safety issues in battery storage systems. The app allows firefighters and emergency personnel to improve situational awareness from a safe distance through automation and remote controls. Since it may often be unclear what the source of the hazard is in the battery unit, the app tells the user exactly what is going on in the system and how best to proceed. Critical battery condition information is communicated quickly and easily to first responders Parameters such as battery temperature, state-of-charge, and fire suppression system status can help inform first responders of the hazard.When first responders arrive at an incident, it may be unclear whether the source of hazard is the battery unit or not by simple visual means Annunciator provides insight into the battery system status with time-stamped information about its condition.