Energizer CR123A Lithium Battery for PIR Sensors and Wireless Alarm Devices

The CR123A is the standard battery format for many wireless alarm devices across multiple manufacturer platforms: the compact high-energy-density 3V lithium cell provides the combination of small physical size, high capacity, and long shelf life required for alarm detectors that operate continuously in standby, transmitting status signals to the alarm panel over their operational life.

Lithium chemistry provides specific advantages over alkaline batteries for alarm detector applications: lithium cells perform consistently at the low temperatures encountered in external and unheated indoor locations, maintain a more consistent voltage throughout the discharge cycle rather than the gradual voltage drop of alkaline cells, and have a substantially longer shelf life for stock management purposes.

The Energizer brand is one of the primary battery suppliers for alarm and security equipment replacement batteries. Using a quality branded lithium cell in wireless alarm devices ensures the battery monitoring and low-battery alert functions in the alarm panel operate correctly: when the device reports a low battery status to the panel, it is the actual battery condition, not a false low-battery report from an inconsistent or generic cell.

For alarm engineers carrying CR123A batteries for wireless detector replacements across London and the UK, and for property owners replacing batteries in wireless alarm devices on Pyronix Enforcer, Ajax, and other systems, the Energizer CR123A provides the standard quality replacement battery.

Key Features

• CR123A 3V lithium battery for wireless alarm detectors and PIR sensors
• Used in Ajax, Pyronix Enforcer, and other wireless alarm system devices
• Lithium: consistent performance in cold temperatures and low-current standby
• Long shelf life: maintains charge during storage for installer stock
• Stable voltage throughout discharge: accurate low-battery reporting
• Energizer quality for reliable alarm device battery monitoring function