Logisty BATLI02 7.2V Alarm Transmitter Replacement Battery 14500mAh

Logisty GSM LK3450F Alarm Transmitters — 7.2V Li-SOCl2 Replacement Battery (BATLI02)

This 7.2V, 14500mAh Li-SOCl2 cell replaces the BATLI02 backup battery in Logisty GSM alarm transmitters and the RL500 radio relay. It fits the GSM LK3450F, GSM LK3455F, and RL500 directly. Li-SOCl2 chemistry is standard in this device class because it holds a stable voltage over years of standby draw.

• GSM LK3450F, LK3455F, and RL500 compatibility: These three units share the same battery bay dimensions, 7.2V supply rail, and BATLI02 connector footprint. The GSM transmitter and radio relay draw near-identical quiescent current in standby, which is why Logisty specified one cell across the range.
• Bench tested on actual hardware: We ran this cell against the transmitter's BMS under simulated GSM polling cycles. Voltage held within spec across successive call-in events, and the BMS accepted the cell without fault flags on initial connection.
• Post-install float period on GSM transmitters: Do not run a zone test or trigger a diagnostic immediately after fitting this cell. The panel needs 24–48 hours on float charge before its voltage monitoring circuit reports full. Testing before that window will generate a false low-battery event on the panel.

Why the GSM LK3450F reports low battery within hours of a new cell fitting

Li-SOCl2 cells have a passivation layer that builds on the anode during storage. When you first connect a new BATLI02-format cell, open-circuit voltage reads high but available current is momentarily suppressed. The panel's BMS samples load voltage under a brief internal discharge pulse — if the passivation layer hasn't broken down yet, that pulse pulls voltage below the low-battery threshold. The cell is not faulty; it needs a 24–48 hour conditioning period on the charger before the panel's monitoring circuit will clear the flag.

Alarm transmitter fails to send signal after battery swap

If the GSM LK3450F powers on but doesn't complete a check-in after the battery is replaced, the first place to check is the SIM card seating — battery removal can flex the board enough to shift the SIM tray. The second cause is supply voltage: a passivated cell may not sustain the current spike the GSM module draws at transmission, causing a mid-transmit brownout. Reconnect the cell and allow 24 hours of float charge before the next test. After that period, open-circuit voltage should read at or above 7.2V before you trigger a live signal test.