According to NFPA, how often should visual inspections of sealed lead-acid batteries occur?

• A. Annually
• B. Semi-annual
• C. Monthly
• D. Weekly

Answer: (B)

Regular maintenance inspections of backup power batteries are essential to keep life-safety systems reliable. For sealed lead-acid batteries used in alarm system standby power, NFPA recommends a visual inspection at least twice a year. This check looks for obvious issues that could affect performance, such as physical damage, swelling, corrosion on terminals, loose or frayed wiring, signs of overheating, or any leakage or enclosure damage that could impact ventilation. Although these batteries are sealed and maintenance-free, aging, vibration, or harsh environmental conditions can cause visible changes that signal a looming failure. A semi-annual visual inspection provides a practical cadence to catch problems early, ensure connections are sound, and document findings for timely corrective action. If the system manufacturer or local codes require more frequent checks, follow those, but NFPA guidance sets semi-annual as the standard interval.