ADI AT-46 Two-Way Radio Replacement Battery 7.4V 1200mAh

ADI AT-46 — 7.4V Li-ion Replacement Battery

This is a 7.4V, 1200mAh Li-ion replacement battery for the ADI AT-46 two-way radio. It slots into the same battery bay as the original pack and uses the same voltage rail. Capacity figure comes from the product data, not a third-party estimate.

• AT-46 platform fit: The AT-46 runs a 7.4V nominal rail with a BMS handshake on insertion. This pack matches that voltage window and connector footprint, so the radio's protection circuit accepts it without a fault state on power-up.
• Bench tested on actual hardware: We cycled this pack through transmit loads on the bench. The BMS held steady through PTT press sequences without tripping into overcurrent lockout, and the radio held its full TX output level across the test.
• First insertion contact check: If the charger dock shows a fault LED on first seating, remove the pack, wipe the contact strip with a dry cloth, and reseat firmly. The AT-46 dock needs a clean contact cycle to complete the BMS handshake before it will begin a charge cycle.

AT-46 bar indicator showing one fewer bar than expected on a new pack

New Li-ion cells ship at storage voltage — typically around 3.6–3.7V per cell, not full charge. The AT-46 reads voltage thresholds and maps them to bar segments. At storage voltage, the radio will display one or two bars even though the pack is not faulty. Put the pack through a full charge cycle in the dock first. After a complete charge, the radio should display a full bar reading at the 7.4V nominal ceiling.

AT-46 cuts out mid-transmission on a new battery

Pressing PTT draws a sharp current spike — significantly higher than standby draw — in the first milliseconds of transmission. If the BMS reads that spike as an overcurrent event, it trips and cuts power to the radio instantly. This is not a radio fault; it is the pack's protection circuit responding to the load profile. Let the pack complete one full charge cycle before heavy use. A fully charged cell has lower internal resistance, which reduces the voltage sag on PTT press and keeps the BMS within its safe operating window.