Maxon CA1450A Comm-Panion Replacement Battery 10.8V 1200mAh

Maxon Comm-Panion CP0150 Series — 10.8V Ni-MH Replacement Battery (CA1450A)

This is a 10.8V, 1200mAh Ni-MH battery for the Maxon Comm-Panion handheld radio range. It replaces OEM part CA1450A and MA181 across the CP0150, CP0150HD, CP0511, CP0515, and more than 48 additional Comm-Panion models. The pack slots into the same battery bay and uses the same contact layout as the original.

• Comm-Panion CP0150 series fit: These models share a common 10.8V three-cell Ni-MH architecture with the same physical locking tab and contact strip orientation. The BMS handshake protocol is consistent across the CP0150, CP0150HD, CP0511, and CP0515 platforms, so one pack covers the full series.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge on the CP0150 platform. The BMS accepted the initial charge without fault, and transmit current spikes during PTT press stayed within the pack's overcurrent threshold throughout testing.
• First insertion into the charger dock: If the dock LED shows a fault on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Maxon charger dock requires a clean contact cycle to register the new pack and begin the charge sequence.

Why the CP0150 cuts out mid-transmission on a new Ni-MH pack

A new Ni-MH cell ships at storage voltage — typically 1.0–1.1V per cell, which puts this three-cell pack around 3.0–3.3V below a fully charged state. When PTT is pressed, transmit current draw spikes sharply. If the pack hasn't been fully charged first, that spike can drag the combined cell voltage below the BMS cutoff threshold, and the radio drops the transmission. A full charge cycle before first use brings each cell to approximately 1.4V, giving the pack enough headroom to sustain the TX current load without tripping the overcurrent cutoff.

Bar indicator showing one fewer bar than expected after fitting a new CA1450A

The Comm-Panion uses a simple voltage-threshold bar indicator — each bar corresponds to a voltage band across the pack. A new Ni-MH pack at storage voltage reads in a lower band, so the indicator shows one or two bars even though the cells are not depleted. This is not a fault with the pack. Charge fully until the dock LED shows green, then reseat the battery. The indicator should read the correct band at full charge, which for this 10.8V pack is approximately 12.6V across all three cells.