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Standard FNB-2 10.8V Ni-MH Replacement Battery FT-4703 1200mAh

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From $43.99 USD $54.99
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Fits Standard FT-4703, FTC-5203, and HH2500 portables; replaces OEM FNB-2 battery pack.
10.8V Ni-MH at 1200mAh delivers the voltage floor this radio needs to maintain full transmit power without sag during sustained RF output.
Connector seats into the radio battery slot with a single locking tab; alignment is keyed to prevent reverse insertion on the FT-4703 chassis.
We bench-tested this cell in an FT-4703 under sustained PTT cycles; the pack held steady voltage with no BMS cutout or dock rejection on first insertion.
On first charge with the Standard charger, the pack may show one bar instead of full — this is normal for a Ni-MH cell at storage voltage; run one complete discharge-recharge cycle and the bar indicator will align with actual capacity.
Delivery time

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

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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.

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🔹 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.

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⚠️ 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

10.8V

Amp

1200mAh

Standard FT-4703 / FTC-5203 Series — 10.8V Ni-MH Replacement Battery (FNB-2)

This is a 10.8V, 1200mAh Ni-MH replacement for the Standard FNB-2 battery pack. It fits the FT-4703, FTC-5203, HH2500, MA18U, and eight additional Standard portables that share the FNB-2 form factor. Voltage and connector match OEM spec — no modifications needed.

  • FT-4703 / FTC-5203 platform fit: These models share the same battery bay dimensions, contact layout, and 10.8V voltage rail. One pack covers the full FNB-2 compatible group without any adapter or modification.
  • Bench tested on actual hardware: We cycled this pack through full charge and discharge on a Standard-compatible dock. The BMS responded correctly to charge termination at peak voltage delta — no false cutoffs, no thermal flags.
  • First-insertion contact check: 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 Standard platform requires a clean contact cycle to complete the BMS handshake before charging begins.

Why the FT-4703 cuts out mid-transmission on a new FNB-2 pack

Ni-MH cells ship at partial charge — typically 30–50% of rated capacity. When PTT is pressed, transmit current spikes sharply. A cell at storage voltage cannot sustain that draw, and the radio's undervoltage protection trips the output stage. This is a cell state issue, not a BMS fault. Run one full charge cycle on the dock before putting the radio into service and the cutout behaviour stops.

Bar indicator shows one fewer bar than expected after fitting a new FNB-2

Standard portables read battery state through voltage-threshold bar indicators — each bar maps to a voltage band. A new Ni-MH pack at storage voltage sits below the top threshold, so the display shows one bar short even on a fresh cell. This is not a capacity defect. Charge the pack fully on a Standard-compatible dock and the indicator will step up to the correct bar count once resting voltage stabilises above 11.5V.

Compatible Models

FT-4703 FTC-5203 HH2500 MA18U FTC-2203 FTC-703A HH400 MCP FT-2003 FTC-2205 FTC-708A MA18

Replaces Part Numbers

FNB-2

Technical Specifications

Voltage10.8V
Amp Hours1200mAh
Capacity1200mAh
Rate12.96Wh
Net Weight204g /7.20 oz
Gross Weight274g /9.67 oz
Approximate Weight274g /9.67 oz
Dimension 87.60 x 54.64 x 18.85mm

Product Highlights

  • Brand: Standard
  • 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 FT-4703 cuts out the moment I press PTT — new battery, why is it dropping?

Ni-MH packs ship at storage charge, roughly 30–50% capacity. Pressing PTT pulls a sharp transmit current spike that a partially charged cell cannot sustain, tripping the radio's undervoltage cutoff. This is not a faulty pack. Charge the FNB-2 fully on a compatible Standard dock and the cutout will stop — resting voltage should read above 11.5V before use.

The charger dock is showing a fault LED and won't start charging the new pack — what's wrong?

The Standard dock needs a clean electrical handshake across the gold contact strip before it will accept a new pack. Residual oxidation or misalignment on first insertion blocks that cycle and the dock flags a fault. Remove the pack, wipe the contacts with a dry cloth, and reseat firmly — the LED should clear and charging should begin within 30 seconds.

This FNB-2 pack sat unused for months — now the dock won't accept it at all. Is it dead?

Extended storage drops Ni-MH cell voltage below the dock's acceptance threshold, and the charger refuses to begin a charge cycle. The pack is not necessarily dead. Apply a slow trickle charge using a universal charger set to the lowest NiMH current setting — typically 100–200mA — until the pack reaches approximately 10.0V, then transfer it to the Standard dock to complete a normal charge cycle.

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