What is the DFIRS battery life?

• A. 72 hours
• B. 48 hours
• C. 24 hours
• D. 96 hours

Answer: (A)

Battery life is the time a system can run on a full charge under expected operating conditions. For DFIRS, the standard endurance is seventy-two hours of operation on a single charge when the system is in its typical, low-power state. This duration supports multi-day missions and keeps critical functions available without daily recharging, which aligns with the needs of airborne EW platforms that must stay online through extended operations. Shorter lifetimes—twenty-four or forty-eight hours—would force more frequent recharging or battery swaps and limit operational flexibility. A much longer runtime, like ninety-six hours, would surpass the validated spec and risk insufficient performance if the battery degrades or if high-power modes are used. Actual runtime depends on power mode, environmental conditions, and workload, but seventy-two hours is the designated endurance.