CR123A vs AA Batteries in Security Sensors – What You Need to Know

CR123A vs AA Batteries in Security Sensors – What You Need to Know

Not sure whether to use CR123A or AA batteries in your security sensors? It depends on your system’s power demands, space constraints, and expected battery life.

CR123A Batteries – Compact Power

Higher voltage (3V) means better performance in wireless motion detectors.

Longer shelf life – up to 10 years, perfect for long-term deployments.

Lithium-based chemistry – stable even in extreme heat or cold.

AA Batteries – Cost-Effective and Accessible

Ideal for low-power keypads and remotes.

Easy to find and replace, but lower energy density.

May require more frequent replacements in wireless sensors.

Which Should You Use?

Use CR123A for critical wireless PIR sensors, glass break detectors, and outdoor modules.

AA may be sufficient for non-critical devices.

Bonus: Ask your supplier if the CR123A batteries they offer are UL or IEC certified for security system use.