3.7V Backup Battery for Ajax Hub, Hub Plus, Hub 2 (2G), ReX and ReX 2
The Ajax AJ-HUBBATT-3W backup battery is designed to replace the internal battery in compatible control panels and range extenders, restoring the emergency power supply required during mains power failures. It is particularly suitable for servicing and repairing existing Ajax alarm systems.
This rechargeable 3.7V 2000mAh (2Ah) Li-Pol battery provides backup power when the main electrical supply is interrupted. It is specifically designed for Hub, Hub Plus, Hub 2 (2G), ReX and ReX 2 devices that use this battery version.
A key feature is its 3-pin cable connector. Before purchasing, the connector inside the device must be physically checked, as visually similar versions may use a 2-pin battery instead. This makes the AJ-HUBBATT-3W particularly suitable for professional installers carrying out maintenance who need to identify the correct replacement part before servicing the system.
This product is specifically a replacement part for existing installations, rather than a battery intended for a new installation. Its purpose is to keep compatible Ajax equipment operating during a power failure, while projects requiring alternative power solutions can use Ajax power supply modules.
Extended information about Ajax 3.7V Backup Battery for Hub, Hub Plus, Hub 2 (2G), ReX and ReX 2 with 3-pin cable connector
Practical applications of Ajax 3.7V Backup Battery for Hub, Hub Plus, Hub 2 (2G), ReX and ReX 2
Example 1. Replacing a degraded battery in an Ajax control panel:
In an existing Ajax installation, a worn internal battery can reduce the available backup time during a mains power failure. The AJ-HUBBATT-3W allows the battery to be replaced in compatible Hub units that use a 3-pin connection, restoring the backup power function without replacing the complete control panel.
Example 2. Preventive maintenance of a ReX or ReX 2 range extender:
In professional security installations where continuity of service is essential, the internal battery can be replaced preventively when its capacity has deteriorated. Before replacement, the installer should physically verify that the device uses the 3-pin battery version, as visually similar units may use a different 2-pin battery.
Package contents of Ajax 3.7V Backup Battery AJ-HUBBATT-3W
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