Motorola CP150 NNTN4496 Replacement Battery 7.4V 2600mAh

Motorola CP150 / CP200 / PR400 — 7.4V Li-ion Replacement Battery (NNTN4496)

This 7.4V, 2600mAh lithium-ion cell replaces the NNTN4496 and its cross-reference variants across the Motorola CP150, CP200, CP250, and PR400 series portable radios. It fits the same battery bay and uses the same three-pin contact layout as the original pack. Voltage and capacity figures come from the product data — 7.4V nominal, 19.24Wh.

• CP/PR platform compatibility: The CP150, CP200, CP250, and PR400 share a common battery bay geometry and BMS handshake protocol. All four models draw from the same 7.4V rail and use the identical three-pin contact strip, which is why a single replacement pack covers the entire platform.
• Bench tested on actual hardware: We cycled this pack through transmit loads on the CP200 bench unit. The BMS held stable across repeated PTT bursts and tripped correctly at low-cell cutoff — no false lockouts during high-draw transmit sequences.
• 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 Motorola charger dock requires a clean contact cycle to complete the BMS handshake before charging begins — a loose or contaminated contact will hold the dock in fault state indefinitely.

Why the CP200 cuts out mid-transmission on a fresh NNTN4496 pack

A new lithium-ion cell ships at storage voltage — typically 3.6–3.7V per cell, not the 4.2V full-charge ceiling. When PTT is pressed, the CP200 transmitter draws a short current spike of 1.5–2A. If the cell is at storage voltage, that spike can pull the pack voltage below the BMS undervoltage threshold momentarily, triggering a protection cutoff. The radio drops audio, then recovers in one to two seconds as the BMS resets. Charge the pack to full before first use and the spike stays well above the cutoff threshold.

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

The CP150 and CP200 use a simple voltage-threshold bar indicator — each bar maps to a voltage band, not a fuel gauge chip. A new pack at storage voltage reads in the lower voltage band, so the radio displays one or two bars even though the cell is not depleted. This is not a fault with the replacement pack. Seat the battery in the charger dock and run a full charge cycle. Once the pack reaches 8.4V (4.2V per cell), the indicator will show all bars correctly.