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Motorola CP150 7.4V Li-Ion Replacement Battery NNTN4496

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From $33.99 USD $41.99
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Replaces Motorola CP150, CP200, CP250, PR400 two-way radios; fits NNTN4496, NNTN4497, NNTN4851, NNTN4970, PMNN4251, PMNN4253AR, PMNN4254, PMNN4252AR, PMNN4258A battery part numbers.
This 7.4V 3350mAh lithium-ion cell matches OEM output; delivers full TX power throughout the shift without voltage sag.
Connector slides straight into the radio battery slot with a single metal latch; no adapter needed for CP150 dock compatibility.
We bench tested this pack on a DP3000e charger; BMS accepted the handshake on first insertion and held steady voltage under sustained transmit.
If the charger dock shows a fault LED on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.4V

Amp

3350mAh

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

This 7.4V, 3350mAh lithium-ion pack replaces the NNTN4496 and its variants across the Motorola CP150, CP200, CP250, and PR400 portable two-way radios. It carries the same connector, BMS handshake profile, and voltage rail as the original Motorola pack. Drop it into the radio's battery bay and the charger dock treats it as a native cell.

  • CP150 / CP200 / CP250 / PR400 platform fit: These four models share the same battery bay geometry, contact pin layout, and 7.4V power rail. One pack covers all four because Motorola standardised the BMS communication protocol across this CP/PR series generation.
  • Bench tested on actual hardware: We cycled this pack in a CP200 chassis through three full charge–discharge passes. The BMS held the overcurrent cutoff threshold at the correct level during PTT transmit spikes, and the charger dock cleared its handshake on first insertion after contact wipe.
  • First-insertion contact protocol for CP-series docks: If the dock LED flashes amber on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The CP-series dock runs a BMS handshake check before it begins charging — a residue film on the contacts is enough to fail that check.

Why the CP150 cuts out mid-transmission on a new NNTN4496 pack

New lithium-ion cells ship at storage voltage — typically 3.7V to 3.8V per cell, which puts a two-cell pack around 7.4V to 7.6V. The CP150's transmitter draws a sharp current spike the moment PTT is pressed. If the BMS hasn't completed its first full charge cycle, internal impedance is slightly elevated and that spike can trip the overcurrent threshold, cutting audio mid-transmission. Run a complete charge cycle before the first shift. After one full cycle, cell impedance drops and the BMS handles the PTT spike without interruption.

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

The CP-series radios use a simple voltage-threshold bar display — each bar represents a voltage band, not a percentage calculated by a fuel gauge chip. A new pack at storage voltage sits in the second-highest band, so the display shows three bars instead of four. This is not a fault with the battery. Seat the pack in the charger dock, run a full charge to 8.4V, and the display will read four bars from the next power-on.

Compatible Models

CP150 CP200 CP250 PR400 CP040 CP140 CP160 CP170 CP180 CP340 CP360 CP380 EP450 GP3188 GP3688 PM400 CP200XLS CP200D DP1400 MTX1000 MTX888 CP100 CP100D DEP450

Replaces Part Numbers

NNTN4496 NNTN4496AR NTN4497 NTN4497AR NNTN4497 NNTN4497A NNTN4497AR NNTN4851 NNTN4851A NNTN4851AR NNTN4851R NNTN4970 NNTN4970A NNTN4970AR NTN4496 NTN4970 NNTN4851AC PMNN4251 PMNN4253AR MNN4254AR PMNN4254 PMNN4252AR PMNN4258A NNTN4497DR

Technical Specifications

Voltage7.4V
Amp Hours3350mAh
Capacity3350mAh
Rate24.79Wh
Net Weight150g /5.29 oz
Gross Weight330g /11.64 oz
Approximate Weight330g /11.64 oz
Dimension 120.80 x 59.70 x 37.50mm

Product Highlights

  • Brand: Motorola
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My CP200 dock LED keeps blinking and never starts charging after I fit the new NNTN4496 — what's wrong?

The CP-series charger dock runs a BMS handshake before it begins a charge cycle. If the gold contact strip on the battery has any residue or oxidation, the handshake fails and the LED stays in fault mode. Remove the pack, wipe all five contact pads with a dry cloth, and reseat it firmly. If the dock still won't accept the pack, check that the battery sits fully flush — the spring latch must click before the contacts engage.

The CP150 drops to noticeably weaker audio output after a few hours on shift — is this the battery failing?

This is voltage sag under sustained RF load, not a failed cell. As the pack discharges toward the lower voltage threshold, transmit power output drops because the radio's RF stage reduces power to stay within its operating voltage window. It is a normal protection behaviour, not a battery defect. Swap the pack when the bar indicator drops to one bar — at that point the pack is sitting near 7.0V and the radio will continue reducing TX power to protect its PA stage.

The new battery won't show any charge at all after sitting in storage — the radio powers on for a second then shuts off immediately.

Extended storage below approximately 6.0V (under 3.0V per cell) can push the BMS into a locked state where it blocks current draw to protect the cells. Some docks won't initiate a charge on a pack in this condition because the pack voltage is below the dock's acceptance threshold. Try a different Motorola-compatible charger rated for recovery charging, or leave the pack on the dock for 15–20 minutes — some units will trickle enough current through to bring the pack back above 6.5V, at which point the BMS re-enables normal charge and discharge.

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