Cobra G368 Replacement Battery 7.2V 230mAh Ni-MH

Cobra G368 / G198 Series — 7.2V Ni-MH Replacement Battery (250BVHx6)

This 7.2V, 230mAh Ni-MH cell replaces the factory battery in Cobra alarm system remote transmitters. It fits the G368, G198, 4198, and 4138 models, restoring arm and disarm functionality to Cobra wireless security remotes. Voltage and capacity match the original specification exactly.

• G368 / G198 / 4198 / 4138 compatibility: These remotes share the same 7.2V six-cell Ni-MH battery pack format, the same connector orientation, and the same BMS charge acceptance threshold. One cell fits all four.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Cobra-compatible remote. The BMS accepted the charge handshake without fault and held voltage within the expected 7.2V nominal band throughout the test cycle.
• Post-install charge conditioning for Cobra remotes: Cobra remotes pull a trickle charge from the alarm panel receiver during standby. After fitting the new cell, leave the remote near the receiver for at least 12 hours before relying on it — the cell needs that initial topped-up state to communicate reliably with the panel.

Why the Cobra panel keeps reporting low battery after a fresh cell swap

Cobra alarm panels poll the remote battery status on a timed cycle, not in real time. A new Ni-MH cell installed below full charge will still report low until it reaches the panel's acceptance threshold — typically around 7.0V under load. The panel BMS needs 24 to 48 hours on trickle charge before it clears the low battery flag. Running a zone test or triggering the remote repeatedly during this window will drain the cell faster than the trickle restores it, keeping the flag active.

Remote sends no signal after battery replacement

If the remote fails to arm or disarm the system immediately after fitting this cell, the most common cause is a voltage drop during button press — the cell has not yet reached operating voltage. Ni-MH cells shipped in storage state can measure 6.8V or lower off the shelf. Put the remote on charge via the panel receiver for a minimum of 12 hours, then retest. If the remote still does not respond after a full charge cycle, check that the cell connector is fully seated — an angled or half-inserted connector will read correct voltage on a meter but fail under the current draw of transmission.