Icom BP-290 Replacement Battery 7.4V 1900mAh
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Icom BP-290 Replacement Battery 7.4V 1900mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Icom BP-290 Replacement Battery 7.4V 1900mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
1900mAh
Icom IC-F52D / IC-F62D / IC-M85 — 7.4V Li-ion Replacement Battery (BP-290 / BP-294)
This is a 7.4V, 1900mAh Li-ion battery for the Icom IC-F52D, IC-F62D, and IC-M85 two-way radios. It replaces OEM part numbers BP-290 and BP-294. The battery fits the same connector and BMS handshake profile across all three models.
- IC-F52D, IC-F62D, and IC-M85 platform: All three radios share the same 7.4V battery bay, contact arrangement, and BMS communication protocol. One pack covers all three models without modification or adapters.
- Bench tested on actual hardware: We cycled this pack through repeated PTT transmit bursts on the IC-F52D. The BMS held stable through sustained RF output and correctly applied overcurrent cutoff at the expected threshold — no false trips during normal keying.
- First insertion into the dock: If the charger shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Icom dock requires a clean contact cycle to accept the BMS handshake from a new pack before charging begins.
IC-F52D bar indicator reading low on a freshly installed BP-290
New Li-ion cells ship at storage voltage — typically 3.6V to 3.7V per cell, which puts the pack around 7.2V to 7.4V at rest. The IC-F52D reads battery level using voltage thresholds, not a fuel gauge chip. At storage voltage, the radio may show one or two bars even on a brand-new pack. Run the pack through one full charge cycle in the dock first. After a full charge the resting voltage rises to approximately 8.3V–8.4V and the bar indicator reads correctly.
Radio drops to reduced TX power mid-shift on the IC-M85
The IC-M85 draws a sharp current spike — up to 2A or more — during transmit. On a cell with elevated internal impedance from age or deep discharge, this spike causes voltage to sag below the radio's power-management threshold. The radio responds by stepping down RF output to protect the circuit. This is not a firmware fault. If the pack recovers voltage within seconds of releasing PTT, the cell impedance is the cause — replace the pack and confirm charge voltage reaches 8.4V before the next shift.
Compatible Models
Replaces Part Numbers
Technical Specifications
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
My IC-F52D charger dock flashes a fault LED and never starts charging after I inserted the new BP-290 — what's happening?
The Icom dock runs a contact-verification cycle before it accepts a new pack's BMS handshake. If the gold contacts on the battery or dock are even slightly oxidised or dusty, the handshake fails and the dock throws a fault LED. Remove the pack, wipe the gold contact strip on both the battery and the dock with a dry cloth, and reseat the pack firmly until it clicks. The LED should shift to red charging within 10–15 seconds.
The radio cuts out completely mid-transmission on a new battery — is the BMS tripping?
Yes — this is an overcurrent trip. During PTT, transmit current spikes sharply and a new pack's BMS will cut output if the draw exceeds its protection threshold, even briefly. This usually happens when the cell hasn't completed its first full charge and internal resistance is still slightly elevated at storage voltage. Charge the pack to 8.4V before use, then retest. If the cutout continues after a full charge, check that the battery contacts are seated fully — a partial connection increases resistance and amplifies the apparent current spike.
The IC-F62D shows a full bar indicator at rest but the bars drop fast once I start transmitting — is this pack faulty?
This is voltage sag under load, not a faulty cell. At rest the pack sits at 8.3V–8.4V and the radio reads full bars. Under transmit load the voltage dips, and if the sag is steep the radio's voltage-threshold indicator drops one or two bars immediately. On a new pack this typically levels out after two or three full charge-discharge cycles as the cells settle. If the sag remains severe after three cycles and the resting voltage never recovers above 8.0V, check that the dock completed a full charge — confirm the dock indicator went green before removing the pack.
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