Technoalarm TX110 Replacement Battery 3.6V 2600mAh C126

Technoalarm TX110 / TX310 Series — 3.6V Li-SOCl2 Replacement Battery (C126BATTRADIO)

This is a 3.6V 2600mAh lithium thionyl chloride cell that replaces the C126BATTRADIO in the Technoalarm TX110, TX120, TX210, and TX310 wireless transmitter modules. These transmitters send zone signals to the alarm control panel — when the cell depletes, that wireless link drops. Physical dimensions are 49.60 × 16.50 × 14.50mm; confirm these match your existing cell before ordering.

• TX110 / TX120 / TX210 / TX310 transmitter fit: These four models share the same C126BATTRADIO cell format, voltage rail, and connector orientation. The TX series transmitters run on a single 3.6V primary lithium cell — no charging circuit, no BMS handshake. Swap the cell and the transmitter resumes signalling immediately on the same RF channel.
• Bench tested on actual hardware: We verified open-circuit voltage at 3.6V and confirmed stable current draw under simulated RF burst transmission. Li-SOCl2 cells can exhibit a temporary voltage dip on first load after long storage — this recovers within a few cycles and does not indicate a faulty cell.
• TX series transmitter installation tip: After fitting the new cell, walk-test the zone from the panel before closing the transmitter cover. A confirmed signal receipt at the panel is faster feedback than waiting for a supervision timeout to clear.

Voltage passivation layer in Li-SOCl2 cells after storage

Li-SOCl2 cells build a thin passivation layer on the lithium anode during storage. On first load, this layer causes a short voltage dip — sometimes as low as 3.0V — before recovering to the nominal 3.6V operating level. This is not a fault; it is a known electrochemical behaviour with this chemistry. In a TX-series transmitter, it may cause one missed RF transmission immediately after installation, which clears on the next supervision cycle without any user action.

Panel still showing zone fault after new cell is installed

The Technoalarm control panel tracks zone supervision signals on a timed cycle — if the transmitter missed its last check-in before the cell was swapped, the panel holds the fault until the next scheduled transmission is received. Fitting the new cell does not instantly clear the log. Trigger a manual walk-test from the panel menu to force a zone poll, or wait for the next automatic supervision window. Once the panel receives a clean RF signal from the TX module, the fault clears and the zone returns to normal status.