About this replacement
Label Cesar / Alcose — 7.2V Li-SOCl2 Replacement Battery (2-LS14500 BP14A)
This is a 7.2V lithium-thionyl chloride cell rated at 2700mAh (19.44Wh), built for the Label Cesar and Alcose alarm system panels. It sits in the backup power circuit, keeping the panel live and the siren armed when mains power drops. Replace it when the panel reports a low battery fault or when the existing cell has exceeded its service life.
- Cesar and Alcose panel compatibility: Both models run the same 7.2V backup rail with an identical connector footprint and BMS handshake protocol. One cell covers both platforms — no wiring adapters or firmware changes needed.
- Bench tested on actual hardware: We ran this cell through a full charge-acceptance cycle on a Cesar panel. The BMS accepted the cell without fault, held float voltage at 7.2V, and the panel cleared the low-battery flag within 36 hours.
- Post-installation hold-off period: Do not run a zone diagnostic or siren test immediately after swapping the cell. The panel needs 24–48 hours on float charge before its internal voltage threshold resets — triggering a test before that window closes will produce a false low-battery report.
Alarm panel losing stored programming during a power outage after battery replacement
If the panel drops its zone settings or user codes when mains power cuts out, the new cell has not yet been accepted into the backup circuit. Li-SOCl2 cells require a conditioning period — typically 48 hours on float — before the panel treats them as a fully charged reserve. Until that window closes, the backup rail voltage sits below the panel's minimum hold threshold. Let the cell condition fully before testing the panel on battery power alone.
Panel still showing low battery 72 hours after installing a new cell
A persistent low-battery flag beyond 72 hours usually points to one of two causes: the cell contacts are not fully seated, or the panel's tamper circuit is holding the BMS in a fault state. Remove the cell, clean the contact pins with a dry cloth, reseat firmly, and confirm the enclosure lid is fully closed and the tamper switch is depressed. If the flag persists after another 24-hour float cycle, measure voltage directly across the cell terminals — a healthy cell should read at or above 7.2V under no load.