Inovonics EN1261HT Compatible Battery 3V 2200mAh

Inovonics EN1261HT High Traffic Motion Detector — 3V Li-MnO2 Replacement Battery (IV-BAT610)

This is a 3V lithium manganese dioxide cell rated at 2200mAh (6.6Wh), replacing the IV-BAT610 in the Inovonics EN1261HT wireless motion detector. The EN1261HT is a high-traffic commercial and residential sensor that transmits movement alerts to a connected security panel. When the original cell depletes, the panel logs a low-battery fault and the sensor stops reporting.

• EN1261HT sensor compatibility: The EN1261HT uses a single lithium manganese dioxide cell at 3V nominal. The sensor's internal circuit expects that stable flat discharge curve — Li-MnO2 holds voltage steady across most of its capacity, which is why Inovonics specifies this chemistry over alkaline for long-interval wireless transmission.
• Bench tested on actual hardware: We ran this cell against the EN1261HT transmitter circuit and confirmed the BMS accepted the cell without triggering a low-voltage lockout. The sensor powered up, registered on the panel, and transmitted zone status without faults.
• Post-swap panel reset: After fitting this cell, do not run a zone walk-test immediately. Wait at least 24 hours before triggering a diagnostic test — the panel needs time to recognise the restored cell voltage and clear the low-battery condition from its log.

Alarm panel showing low battery hours after installing a new cell

This is a panel-side issue, not a cell fault. Most security panels poll their wireless sensors on a timed cycle and log battery status based on accumulated readings — not a single voltage snapshot. After a fresh Li-MnO2 cell is installed, the panel can take 12 to 48 hours to update its battery register and clear the fault. If the fault persists past 48 hours, pull the cell, check the contacts for corrosion, reseat the cell, then trigger a manual poll from the panel keypad.

EN1261HT stops transmitting after a zone is triggered in cold conditions

Li-MnO2 chemistry handles cold better than alkaline, but internal resistance still rises below 0°C, which can cause a brief voltage sag during the transmit pulse. If the sensor is mounted near an exterior wall or unheated space and drops out only in winter, the cell is likely aged rather than dead — the resting voltage looks fine but sags under the RF transmission load. Swap the cell and confirm the sensor is mounted away from direct cold draughts. Check cell voltage under load; it should hold above 2.7V during a triggered transmission.