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Icom BP-243 Replacement Battery 3.7V 1500mAh

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From $24.99 USD $30.99
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Fits Icom IC-E7, IC-P7, IC-P7A handhelds; replaces OEM BP-243 battery pack.
3.7V, 1500mAh cell delivers consistent voltage for transmission and reception cycles.
Connector seats vertically into the radio's battery slot with mechanical keying tab.
We bench-tested this cell in an IC-E7 at full PTT load; BMS accepted dock handshake on first insertion with no fault light.
If the charger dock shows a fault LED after inserting this battery, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly — the Icom platform requires a clean contact cycle to accept the new BMS before charging begins.
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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

3.7V

Amp

1500mAh

Icom IC-E7 / IC-P7 Series — 3.7V Li-ion Replacement Battery (BP-243)

The BP-243 is a 3.7V, 1500mAh Li-ion battery for the Icom IC-E7, IC-P7, and IC-P7A handheld amateur radio transceivers. It slots into the same battery bay as the original Icom pack, using the same three-pin contact strip and BMS handshake the charger dock expects. Capacity is rated at 5.55Wh.

  • IC-E7, IC-P7, and IC-P7A fit: All three models share the same battery form factor, contact layout, and 3.7V supply rail. The charger dock identifies the pack through the BMS data line, not just voltage, so the BP-243 must present the correct handshake — this one does.
  • Bench tested on actual hardware: We ran the BP-243 through charge cycles on the BC-167 dock and monitored BMS response during simulated PTT bursts. The protection circuit held cutoff correctly at both high-draw transmit spikes and at rest.
  • First insertion into the dock: If the BC-167 shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The dock requires a clean contact cycle to complete the BMS handshake before it will begin charging.

Why the IC-E7 cuts out the moment you press PTT on a new BP-243

A new Li-ion cell ships at storage voltage — typically around 3.6V to 3.65V, not a full 4.2V charge. When you press PTT, the IC-E7 draws a sharp current spike to power the transmitter stage. At storage voltage, that spike can push the BMS overcurrent threshold and trigger an immediate cutout. The fix is straightforward: charge the pack fully on the BC-167 before first use. Once the cell is at 4.2V, the transmit spike stays well within the BMS window.

Bar indicator showing one fewer bar than expected after a full charge

The IC-E7 reads voltage thresholds to drive its bar indicator — it does not have a fuel gauge chip. A new cell that has just completed its first charge cycle may show slightly lower resting voltage than a broken-in pack, causing the indicator to read one bar low. Run two to three full charge and discharge cycles and the resting voltage will stabilise. After that, a full charge should sit at 4.2V open-circuit and the display will show the correct bar count.

Compatible Models

IC-E7 IC-P7 IC-P7A

Replaces Part Numbers

BP-243

Technical Specifications

Voltage3.7V
Amp Hours1500mAh
Capacity1500mAh
Rate5.55Wh
Net Weight33g /1.16 oz
Gross Weight58g /2.05 oz
Approximate Weight58g /2.05 oz
Dimension 53.00 x 35.30 x 11.30mm

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-E7 drops to low TX power mid-transmission even though the battery was fully charged — what's happening?

Sustained RF output draws more current than a short PTT burst, and if the cell's impedance has risen even slightly, voltage sags under that load. The radio's TX power stage backs off automatically when supply voltage drops below its operating threshold. We measured this on the bench during extended transmissions — the BP-243 held voltage stable across short bursts, but older or partially degraded cells sag noticeably past 30 seconds. If this happens consistently with a new pack, confirm the contact strip is clean and reseated; a poor contact adds resistance that accelerates sag.

The BC-167 dock blinks a fault LED and never starts charging — I've reseated the battery three times.

A fault LED that never clears usually means the pack voltage is below the dock's acceptance threshold, typically under 3.0V. This happens after extended storage when the cell has self-discharged past the point the charger will auto-accept. Remove the battery, wait 60 seconds, and reseat — some docks retry the handshake after a reset cycle. If the fault persists, check the gold contacts on both the pack and dock for oxidation, clean with a dry cloth, and try again; the BC-167 needs a clean data-line connection to initialise charging.

The battery was sitting unused for several months and now the radio won't power on at all — is the pack dead?

Li-ion cells in storage self-discharge slowly, and after several months the BP-243 may have dropped below the BMS's minimum recovery voltage. At that point the BMS locks the cell to prevent damage, and the radio sees no power even though the pack is not faulty. Seat the pack in the BC-167 and watch for any charge indicator within the first two minutes — if the dock accepts it at all, leave it on a full charge cycle. If the dock shows no response, measure the pack's contact voltage with a multimeter; a reading above 2.5V means recovery is still possible on a compatible charger set to a low pre-charge current.

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