About this replacement
Icom IC-F3001 / IC-3101 Series — 7.4V Li-ion Replacement Battery (BP-265)
This is a 7.4V, 3350mAh lithium-ion replacement for the Icom BP-265 battery pack. It fits the IC-3101, IC-4101, IC-F3001, IC-F3002, and over a dozen additional Icom handheld transceivers that share the same BP-265 form factor and connector. Capacity is 3350mAh (24.79Wh), matching the original pack specification.
- IC-3101 / IC-F3001 platform fit: These models share the same battery bay geometry, gold contact strip layout, and BMS handshake protocol. One pack covers the full BP-265 footprint across professional and recreational Icom handheld lines without modification.
- Bench tested on actual hardware: We ran this pack through charge and transmit cycles on an IC-F3001. The BMS handled the PTT transmit current spike without tripping overcurrent cutoff, and the charger dock accepted the handshake within one charge cycle.
- First insertion into the charger dock: If the dock shows a fault LED on first insertion, remove the pack and wipe the gold contact strip with a dry cloth before reseating. The Icom charger platform requires a clean contact cycle to complete the BMS handshake before charging will begin.
IC-F3001 charger dock fault LED after BP-265 swap
New BP-265 packs ship at storage voltage — typically around 3.7V per cell, not the 4.2V per cell a full charge would show. Some Icom dock chargers check cell voltage at first contact and throw a fault LED if the reading falls outside their expected window. This is a dock-side voltage threshold response, not a defective pack. Wipe the contacts, reseat the battery firmly, and the dock should begin a normal charge cycle. If the fault LED persists, allow the pack to warm to room temperature and retry.
Bar indicator shows one fewer bar than expected on a new BP-265
The IC-3101 and IC-F3001 use a simple voltage-threshold bar indicator — each bar corresponds to a voltage band, not a percentage calculated by a fuel gauge chip. A new pack at storage voltage sits in a lower band and will display one fewer bar than a fully charged cell. This is not a capacity fault. Run a full charge cycle first — the dock green LED confirms completion — then check the indicator. At full charge the cells should read above 8.3V across the pack and the indicator will reflect that.