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Motorola NTN7143 GP900 Replacement Battery 7.5V 1500mAh

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From $47.99 USD $59.99
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Fits Motorola GP900, GP1200, HT1000, and HT6000 radios. Replaces OEM battery part numbers NTN7143, NTN7143CR, NTN7144, NTN7144CR, NTN7143A, NTN7143B, NTN7143R, NTN7144A, NTN7144B, and FuG11b.
This 7.5V, 1500mAh nickel-metal hydride pack delivers the voltage and capacity the GP900 platform requires for full transmission power and sustained field operation.
Connector slides straight onto the radio's gold contact strip with the locking tab facing downward; push until it seats flush against the radio body.
We bench-tested this cell on a GP900 radio through multiple charge cycles; the Motorola platform accepted it without fault codes and held voltage steady under PTT transmit load.
On first insertion into a Motorola charger dock, if the fault LED appears, remove the battery and wipe the gold contact strip with a dry cloth, then reseat firmly — the dock requires a clean contact cycle before accepting the new cell.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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

7.5V

Amp

1500mAh

Motorola GP900 / HT1000 Series — 7.5V Ni-MH Replacement Battery (NTN7143)

This is a 7.5V, 1500mAh nickel-metal hydride battery for Motorola portable land mobile radios including the GP900, GP1200, HT1000, and HT6000. It replaces OEM part numbers NTN7143, NTN7144, and their variants. The pack slots into the same housing as the original and connects to the same BMS handshake points in the charger dock.

  • GP900, GP1200, HT1000, HT6000 platform: These models share the same 7.5V three-cell Ni-MH rail, identical connector pinout, and the same dock communication protocol — so one pack covers the whole family without any adapter or firmware flag.
  • Bench tested on actual hardware: We cycled this pack through full charge and transmit-load discharge on the GP900 platform. The BMS held stable under repeated PTT draw spikes and the dock accepted the pack without fault LED on a clean contact seat.
  • First insertion into the dock: If the dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Motorola dock requires a clean contact cycle to register the new pack's BMS handshake before charging will begin.

Why the GP900 cuts out mid-transmission on a new NTN7143 pack

A new Ni-MH pack ships at storage voltage — typically 6.8–7.0V across three cells. When PTT is pressed, the transmitter pulls a sharp current spike of 1.5–2A or more. If the cells haven't been through a full charge cycle first, that spike can drag terminal voltage below the radio's undervoltage cutoff, killing the transmission. The BMS interprets this as an overcurrent event and opens the output gate. Run one full charge before taking the radio into the field.

Bar indicator showing one fewer bar than expected on a freshly charged pack

The GP900 uses a voltage-threshold bar indicator, not a fuel gauge chip. A new Ni-MH cell at full charge reads slightly lower than a broken-in cell because the voltage curve hasn't been conditioned yet. After two or three full charge-discharge cycles, cell voltage at full charge rises to its rated peak and the indicator catches up. If the pack still reads low after three cycles, check terminal voltage with a meter — a healthy 7.5V Ni-MH pack fully charged should read 8.4–8.7V at rest.

Compatible Models

GP900 GP1200 HT1000 HT6000 JT1000 MT2000 MT2100 MTS2000 MTS2010 MTS2013 MTX8000 MTX9000 HAT100 GP2010 GP2013 MTZ2000 PTX1200

Replaces Part Numbers

NTN7143 NTN7143CR NTN7144 NTN7144CR NTN7143A NTN7143B NTN7143R NTN7144A NTN7144B FuG11b WPNN4013

Technical Specifications

Voltage7.5V
Amp Hours1500mAh
Capacity1500mAh
Rate11.25Wh
Net Weight231g /8.15 oz
Gross Weight411g /14.50 oz
Approximate Weight411g /14.50 oz
Dimension 156.00 x 57.00 x 33.00mm

Product Highlights

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

Frequently Asked Questions

My GP900 transmits fine for the first few minutes then suddenly drops out — is the new NTN7143 pack faulty?

Most likely not. Under sustained RF output, Ni-MH cells experience voltage sag as internal temperature rises and cell impedance increases. The radio's undervoltage protection cuts TX power or drops the link to protect the final stage. Let the pack cool for ten minutes and check resting voltage — it should sit above 7.2V. If voltage is normal at rest but sag still causes drop-out under TX load, condition the pack with two more full charge-discharge cycles to lower cell impedance.

The charger dock blinks a fault LED and never starts charging the new pack — what's wrong?

The Motorola dock checks for a minimum acceptance voltage before it will initiate a charge cycle. A new pack shipped in storage mode can sit below that threshold. Remove the pack, wipe the gold contact strip with a dry cloth, and reseat it firmly to clear any contact resistance. If the fault LED persists, measure the pack's open-circuit voltage — if it reads below 6.0V, place it in a compatible Ni-MH charger set to a recovery or trickle mode to bring the cells above the dock's acceptance floor before returning it to the Motorola dock.

The NTN7143 pack sat unused in a drawer for several months — now the radio powers on but the bar indicator drops almost immediately. Can it be recovered?

Extended storage causes Ni-MH cells to self-discharge and can push individual cells into a reversed-polarity state. The BMS may also enter a lockout condition if cell voltage dropped below roughly 1.0V per cell during storage. Run the pack through a slow trickle charge at 150–200mA for two to four hours first, then follow with a normal charge cycle. After two full cycles, check resting voltage — a recoverable pack will stabilise above 7.2V at rest; one that stays below 6.5V after conditioning has cells that won't recover.

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