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Icom IC-F3400 Replacement Battery BP-283 7.4V 3500mAh

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From $48.99 USD $60.99
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Fits Icom IC-F3400, IC-F3400D, IC-F3400DP, IC-F3400DPS and 18 additional models; replaces BP-283, BP-284, BP-303 battery packs.
7.4V, 3500mAh lithium-ion delivers stable voltage under sustained UHF transmission without mid-shift power sag on the IC-F3400 platform.
Connector slides into the radio's vertical battery slot with a positive lock tab that seats flush against the radio chassis.
We ran load cycles on the bench with this pack in an IC-F3400D; the BMS accepted the charger dock on first insertion with no fault LED.
If the charger dock shows a fault light after inserting this cell, remove and reseat — the Icom platform needs a clean contact cycle to accept the new BMS handshake.
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.

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

3500mAh

Icom IC-F3400 Series — 7.4V Li-ion Replacement Battery (BP-283 / BP-284 / BP-303)

This is a 7.4V, 3500mAh Li-ion battery pack for the Icom IC-F3400 series land mobile radios. It replaces OEM part numbers BP-283, BP-284, and BP-303. The pack fits the IC-F3400, IC-F3400D, IC-F3400DP, IC-F3400DPS, and over 18 additional IC-F3400 variants.

  • IC-F3400 series platform fit: All IC-F3400 variants share the same 7.4V voltage rail, contact layout, and BMS handshake protocol. Swapping between D, DP, and DPS sub-models does not change the battery requirement — the same pack covers the full series.
  • Bench tested on actual hardware: We ran this pack through charge and transmit cycles on the IC-F3400D dock. The BMS accepted the charger handshake cleanly, held voltage above 7.0V through sustained PTT bursts, and tripped overcurrent protection correctly at the expected threshold.
  • First insertion contact check: 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 IC-F3400 charger dock requires a clean contact cycle to complete the BMS handshake before it will begin charging.

IC-F3400 cuts out mid-transmission on a new BP-283 pack

A new Li-ion cell ships at storage voltage — typically 3.6–3.7V per cell, giving around 7.2–7.4V at pack level. The IC-F3400 draws a sharp current spike at PTT press for RF output, and if the BMS reads voltage dipping below its trip threshold on that spike, it cuts TX power to protect the cells. This is not a faulty pack — it is the BMS responding to high impedance in an unconditioned cell. Run one full charge cycle through the dock before field use; cell impedance drops after the first full charge and the cutout stops.

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

The IC-F3400 uses voltage-threshold bar indicators, not a fuel gauge chip. At storage voltage, the pack sits below the threshold the radio maps to a full-bar reading, so the display shows one bar short even on a brand-new cell. This is a voltage reading, not a capacity fault. Charge the pack fully in the dock until the charge LED goes green, then reseat it — the indicator will read correctly once the pack is at or above 8.2V resting voltage.

Compatible Models

IC-F3400 IC-F3400D IC-F3400DP IC-F3400DPS IC-F3400DPT IC-F3400DS IC-F3400DT IC-F4400 IC-F4400D IC-F4400DP IC-F4400DPS IC-F4400DPT IC-F4400DS IC-F4400DT IC-F7010 IC-F7010S IC-F7010T IC-F7020 IC-F7020S IC-F7020T IP730D IP740D

Replaces Part Numbers

BP-283 BP-284 BP-303

Technical Specifications

Voltage7.4V
Amp Hours3500mAh
Capacity3500mAh
Rate25.9Wh
Net Weight138.4g /4.88 oz
Gross Weight288.4g /10.17 oz
Approximate Weight288.4g /10.17 oz
Dimension 114.32 x 51.32 x 22.08mm

Product Highlights

  • Brand: Icom
  • 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

The IC-F3400 drops to noticeably weaker audio and TX output partway through a shift — is the pack failing or is something else going on?

Sustained RF transmission pulls steady current from the pack, and if cell impedance has climbed — common after 18–24 months of daily cycling — voltage sags under that load and the radio scales back TX power to stay within operating range. This is voltage sag under sustained output, not a sudden cell failure. Check resting voltage after a full charge: a healthy pack reads 8.2–8.4V. If resting voltage is below 7.8V after a full charge cycle, the pack has degraded and needs replacing.

The charger dock fault LED won't clear no matter how many times I reinsert the BP-283 — what's causing it?

The IC-F3400 dock checks pack voltage before it will accept a charge cycle. If a pack has been stored discharged for an extended period, cell voltage can drop below the dock's acceptance threshold — typically around 6.0V — and the dock rejects it entirely rather than attempting recovery. Remove the pack, wipe the gold contact strip with a dry cloth, and reseat slowly to ensure all contacts seat fully. If the fault LED still does not clear, check resting pack voltage with a multimeter; a reading below 6.0V means the BMS has locked out and the pack cannot be recovered through the standard dock.

The IC-F3400 cuts out completely at PTT press after the pack sat unused in a drawer for several months — is this a BMS lockout?

Yes. Extended storage in a partially discharged state can push cell voltage below the BMS recovery threshold, triggering a lockout that blocks output current even when the pack appears to have some charge. The dock may still show a charging LED because it sees enough voltage to begin a surface charge, but the BMS will not release current for transmit. Place the pack on charge for a full uninterrupted cycle; if the dock completes the cycle and resting voltage returns to at least 7.8V, the BMS has re-initialised and the radio will transmit normally.

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