Motorola APX7000 NTN7034 Replacement Battery 7.4V 4600mAh

Motorola APX7000 / APX6000 Series — 7.4V Li-ion Replacement Battery (NTN7034)

This is a 7.4V, 4600mAh Li-ion battery for the Motorola APX7000, APX7000XE P25, APX6000, and APX6000XE P25 portable radios. It replaces OEM part numbers including NTN7034, NNTN7034A/B, NNTN7038A/B, PMNN4487A, PMNN4486A, NNTN8921A/B/C, and NNTN7035A, among others. Built to the same voltage rail and connector spec as the factory pack.

• APX7000 and APX6000 platform fit: Both radio families run the same 7.4V nominal rail, share the same multi-pin battery connector, and require the same BMS handshake with the radio's power management circuit. One battery covers both platforms without modification.
• Bench tested on actual hardware: We cycled this pack on an APX7000 body under simulated PTT transmit loads. The BMS handled the transmit current spike without tripping into overcurrent lockout, and the radio's bar indicator stepped up correctly as the cells moved from storage voltage to operating range.
• First insertion contact cycle: If the charger dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The APX platform requires a clean contact surface to complete the BMS handshake before the charge cycle begins.

Why the APX7000 cuts out mid-transmission on a new battery

A new Li-ion cell ships at storage voltage — typically around 3.6–3.7V per cell, not the 4.2V peak of a full charge. When the radio keys up, transmit current surges sharply. If the pack hasn't been fully charged first, that surge pulls cell voltage below the BMS overcurrent threshold, and the BMS trips the circuit to protect the cells. The radio goes silent mid-transmission — not because the battery is faulty, but because it was never topped up. A full charge cycle before first use on an APX platform eliminates this completely.

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

The APX series uses voltage-threshold bar indicators — each bar corresponds to a voltage window, not a percentage readout. A new pack at storage voltage sits in a lower threshold window, so the radio correctly displays fewer bars. This is not a fault with the battery or the radio. Put the pack through a full charge in an APX-compatible dock until the charge LED goes green, then reinsert. The indicator will step to the correct level once the cells are at operating voltage.