About this replacement
Icom IC-V86 / IC-T70A Series — 7.4V Li-ion Replacement Battery (BP-298)
The BP-298 is a 7.4V, 2600mAh lithium-ion battery for the Icom IC-V86, IC-V80, IC-T70A, and IC-T70E handheld transceivers. These are VHF and dual-band portables used across commercial, professional, and amateur radio operations. It slots into the same battery bay and uses the same connector as the original Icom pack.
- IC-V86 / IC-V80 / IC-T70 platform fit: All four models share the same 7.4V two-cell Li-ion architecture, battery bay footprint, and BMS handshake protocol — one pack covers the full series without modification.
- Bench tested on actual hardware: We ran this pack through charge and transmit cycles on the IC-V86. The BMS handled PTT-triggered current spikes without tripping, and the charger dock accepted the pack cleanly on first insertion.
- First insertion on the charger dock: 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 Icom platform requires a clean contact cycle to complete the BMS handshake before charging begins.
Why the IC-V86 cuts out mid-transmission on a freshly inserted BP-298
A new cell ships at storage voltage — typically 3.6–3.7V per cell, not the 4.2V full-charge peak. When you key up on a fresh, uncharged pack, the transmit current draw can pull cell voltage below the BMS undervoltage threshold instantly. The BMS reads this as a fault condition and cuts output to protect the cells. The fix is straightforward: charge the BP-298 fully before the first transmission. Once both cells are at or near 4.2V, the voltage headroom under TX load is sufficient and the BMS stays open.
Bar indicator showing one fewer bar than expected after a full charge
The IC-V86 reads battery level from a simple voltage-threshold lookup — there is no fuel gauge chip involved. A new BP-298 may sit at 4.15–4.18V per cell after a first charge cycle rather than the full 4.2V, which can land just under the top bar threshold. This is not a fault with the pack. Run one full charge-and-transmit cycle to let the cells settle, then recharge to capacity. The bar indicator should align correctly once the cells have been through a real load cycle and the charger has topped them to their rated ceiling.