A cell voltage test for VRLA batteries must be performed how often?

• A. Semiannually
• B. Annually
• C. Weekly
• D. Monthly

Answer: (A)

Regularly checking the voltage of each cell in a VRLA battery bank is a health check that helps catch aging, imbalances, or failing cells before a failure affects critical power. VRLA units are sealed and designed for long life, so you don’t need the most frequent vigilance, but periodic verification is still essential to ensure readiness.

Six-month testing strikes a practical balance: it detects drift or deterioration that develops over months while keeping maintenance effort reasonable. If the system is in a high-stress environment (high temperature, recent deep discharge) or is particularly critical, you might test sooner, but the semiannual cadence remains a common baseline.

Less frequent schedules (annually) risk missing developing issues, while more frequent ones (monthly or weekly) can be unnecessarily burdensome for many VRLA setups.