344A456P1 Ma-Com-Ericsson 600P Replacement Battery 7.2V 2000mAh

Ma-Com-Ericsson 600P / Cougar Series — 7.2V Ni-MH Replacement Battery (344A456P1)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Ma-Com-Ericsson 600P and Cougar 405P/625P series portable two-way radios. It replaces OEM packs including PB200, PB300, TOPB100, TOPB200, TOPB300, and several BKB191 variants. Capacity data comes from the product specification — 14.4Wh total energy.

• 600P and Cougar platform fit: These radios share a common 7.2V battery bay, connector pin-out, and BMS handshake protocol across the 405P, 625P, and GP405STX lines. One pack format covers the full range because the voltage rail and contact layout did not change across those models.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge on a 600P chassis. The BMS accepted charge without fault, and PTT transmit current spikes did not trigger overcurrent cutoff at any point during the test sequence.
• First insertion into the charger dock: If the dock shows a fault or blinking LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Ma-Com-Ericsson dock requires a clean contact surface to complete its BMS handshake before it will begin charging.

Why the 600P cuts out mid-transmission on a new Ni-MH pack

Ni-MH cells ship at storage charge — typically 40–60% of rated capacity. When PTT is pressed, transmit current spikes hard. If the cell voltage drops below the radio's undervoltage threshold during that spike, the BMS cuts power to protect the pack. This is not a faulty battery. Run two or three full charge cycles first, and the cells will reach operating capacity where the voltage holds steady through the transmit surge.

Bar indicator showing one fewer bar than expected after charging

The 600P uses voltage-threshold bar indicators — each bar maps to a voltage band, not a fuel gauge calculation. A new Ni-MH pack sometimes rests at a lower open-circuit voltage after the first charge because the cells have not yet been conditioned. After a second full charge cycle, resting voltage typically rises to 8.4–8.6V and the display reflects a full charge correctly. If the indicator still reads low after three cycles, check that the dock contacts are clean and making firm contact with the pack's gold strip.