About this replacement
Icom IC-24AT / IC-2SA Series — 7.2V Ni-MH Replacement Battery (BP-82)
This is a 7.2V, 600mAh Ni-MH battery pack for the Icom IC-24AT and related handheld transceivers. It replaces OEM packs BP-82, BP-83, BP-84, and BP-85 across the IC-24AT, IC-24ET, IC-25RA, and IC-2SA platforms. The pack slots into the same battery bay and connects through the same contact strip as the original.
- IC-24AT / IC-2SA series compatibility: These models share the same 7.2V battery bay geometry, contact layout, and BMS handshake protocol — which is why one pack covers all of them. Swapping between models in this family requires no adapters or firmware changes.
- Bench tested on actual hardware: We ran this pack on the IC-24AT under transmit load and monitored BMS behaviour through the charge and discharge cycle. The BMS accepted the charger handshake on first insertion and held voltage within spec across repeated PTT cycles.
- Contact strip reset on first dock insertion: If the charger shows a fault LED on first use, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Icom dock requires a clean contact cycle to complete the BMS handshake before it begins charging.
IC-24AT transmit current spike and BMS overcurrent trip
When you press PTT, the IC-24AT draws a sharp current spike as the RF output stage powers up. On a new pack, the BMS may interpret this spike as an overcurrent event and trip the protection circuit momentarily. This is especially common in the first few charge cycles before the cells settle to their operating impedance. If the radio cuts out the instant you key up but recovers when you release PTT, the BMS is tripping on transmit surge — not a faulty cell. Run two or three full charge cycles and the trip threshold stabilises.
Bar indicator showing one fewer bar than expected on a new pack
Ni-MH packs ship at storage voltage — typically around 6.0–6.5V — not at full charge. The IC-24AT's voltage-threshold bar indicator reads this as a partially depleted pack. This is normal and not a sign the replacement is underspec. Put the pack through a full charge cycle in the dock until the charger LED goes green, then check the bar display again. After a complete charge the indicator should read full at 7.2V.