Ajax 3.7V Backup Battery for Hub, Hub Plus, Hub 2 (2G), ReX and ReX 2

Ajax 3.7V Internal Backup Battery with 2-Pin Connector

Keep your Ajax security system operational during power failures by replacing a worn internal battery with the AJ-HUBBATT-2W backup battery. This replacement component helps restore backup power without having to replace the entire control panel or signal repeater.

The battery provides 3.7 V and 2000 mAh (2 Ah) and features an integrated cable with a 2-pin connector. It is designed for the Ajax alarm system and is compatible with suitable versions of Hub, Hub Plus, Hub 2 (2G), ReX and ReX 2. Installers working with an Ajax Hub 2 alarm control panel can use it to replace the internal backup battery when the corresponding unit uses the 2-pin connection.

This is specifically a replacement part for maintaining existing installations, rather than a component required for new installations. It is particularly suitable for professional installers servicing Ajax systems who need to restore reliable backup power to a compatible hub or repeater. Before replacement, always check that the existing battery uses a 2-pin connector, as Ajax equipment may use a different battery connection depending on the hardware version.

In summary, the Ajax AJ-HUBBATT-2W backup battery combines 3.7 V, 2000 mAh capacity and a 2-pin connection in a replacement designed for compatible Ajax hubs and repeaters. If the device instead requires a three-pin connection, see the Ajax 3-pin backup battery.

Reference: AJ-HUBBATT-2W