Battery Monitoring System for Flooded Lead-Acid And Ni-Cd Batteries Flooded lead-acid and Ni-Cd batteries remain essential for critical DC backup power, but manual inspections cannot provide continuous visibility into battery health. Discover how DFUN BMS monitors voltage, temperature, internal resistance, SOC, SOH, electrolyte level and terminal leakage—helping utilities and industrial operators detect faults early, reduce maintenance workload and improve backup power reliability.