Motorola DP3000e PMNN4440 Replacement Battery 7.4V 2600mAh

Motorola DP3000e Series — 7.4V Li-ion Replacement Battery (PMNN4440)

This is a 7.4V 2600mAh Li-ion battery for the Motorola DP3000e, DP3441, DP3441e, and DP3661 series portable digital radios. It replaces OEM part numbers PMNN4440, PMNN4440AR, PMNN4502A, and PMNN4511A. Same voltage, same connector, same BMS handshake as the original pack.

• DP3000e / DP3441 / DP3661 platform fit: These models share the same 7.4V battery rail, locking latch geometry, and BMS communication protocol. One pack covers the full family without modification.
• Bench tested on actual hardware: We ran this pack through charge cycles on the Motorola IMPRES dock and a standard single-unit charger. The BMS negotiated handshake correctly on both, and overcurrent protection tripped as expected during simulated PTT surge loads.
• First insertion into the charger dock: If the dock LED blinks amber or shows a fault on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The DP3000e platform requires a clean contact cycle before the charger accepts the new BMS handshake.

Why the DP3000e cuts out mid-transmission on a new battery

During PTT, the DP3000e draws a sharp current spike — sometimes exceeding 2A — as the RF stage powers up. A new cell shipped at storage voltage (typically 3.6–3.7V per cell) has less headroom to absorb that spike than a fully charged pack. The BMS interprets the voltage dip as an overcurrent event and interrupts output momentarily. A full charge cycle before first field use brings cell voltage to 4.1–4.2V per cell, which eliminates the dropout under TX load.

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

The DP3000e uses voltage-threshold bar indicators — it reads pack voltage and maps it to a bar level, nothing more. A new pack at storage voltage reads lower than a post-charge pack, so the radio displays one bar even though the cell is not depleted. This is not a fault with the battery or the radio. Charge the pack fully first — once cell voltage reaches operating range, the indicator will display the correct level.