Jablotron JA-163A Compatible Battery 3.6V 14500mAh Li-SOCl2

Jablotron JA-163A Fully Wireless Outdoor Siren — 3.6V Li-SOCl2 Replacement Battery (BAT-100A)

This is a 3.6V, 14500mAh Li-SOCl2 cell replacing the BAT-100A battery inside the Jablotron JA-163A wireless outdoor siren. The JA-163A runs entirely on this cell during standby and active alarm events, with no connection to mains wiring. When the original cell depletes after years of standby drain, this replacement restores full siren operation.

• JA-163A siren compatibility: The JA-163A uses a single-cell 3.6V Li-SOCl2 chemistry because the module's low self-discharge rate matches long standby periods between alarm events. The connector and housing dimensions — 61.30 × 34.60 × 33.20mm — align directly with the JA-163A battery compartment. No adapter or wiring modification needed.
• Bench tested on actual hardware: We ran this cell through the JA-163A's BMS handshake and confirmed the panel accepted the new cell and cleared the low-battery flag after the standard float charge settling period. The cell held 3.6V nominal under siren-activation load pulses without triggering undervoltage cutoff.
• Post-installation float charge: After fitting this cell, leave the system powered and armed for 24–48 hours before running any zone or siren test. Li-SOCl2 cells fresh from storage carry a thin passivation layer on the anode that requires a short stabilisation period under load. Testing too early can trigger a false low-battery report on the panel.

Why the JA-163A panel still reports low battery after a new cell is fitted

Li-SOCl2 cells develop a lithium chloride passivation layer during storage that temporarily raises internal resistance. When the panel first polls the new cell, the voltage reading can sit below the panel's acceptance threshold — typically around 3.4V — even though the cell is fully charged. This is not a fault with the cell. The passivation layer dissolves once the cell delivers a small discharge current over 24–48 hours on standby. After that settling period, re-arm the system and allow the panel to re-poll; the low-battery alert will clear at or above 3.5V.

JA-163A siren silent on test after battery swap

If the siren fails to sound during a walk-test triggered immediately after battery replacement, the cause is almost always the same passivation effect described above — the cell's momentary high internal resistance means the siren module cannot draw sufficient current to activate the transducer. The JA-163A's internal circuit requires a stable supply above 3.3V under peak siren-load draw. Wait a full 48 hours with the system powered before running a siren activation test. If the siren is still silent after that window, check that the battery contacts are clean and seated flush — any oxidation on the terminals will sustain the resistance problem.