Midland LXT276 Replacement Battery BATT6R 4.8V 700mAh

Midland LXT276 / LXT376 Series — 4.8V Ni-MH Replacement Battery (BATT6R)

This is a 4.8V, 700mAh Ni-MH replacement battery for the Midland LXT276, LXT376, LXT314, LXT317, and more than 22 additional LXT-series two-way radios. It replaces OEM part numbers BATT6R, BATT-6R, and AVP6. Voltage and cell count match the original pack exactly.

• LXT-series platform fit: These models share the same 4.8V four-cell Ni-MH configuration, connector layout, and contact spacing. The battery slots directly into any LXT-series dock or in-radio charger that accepts the BATT6R footprint without modification.
• Bench tested on actual hardware: We cycled this pack through transmit loads on the LXT276 platform. The BMS held voltage through repeated PTT bursts without tripping overcurrent cutoff, and the dock accepted the handshake on first insertion.
• Contact strip care on first dock insertion: If the charger LED flashes a fault on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The LXT dock requires a clean contact cycle to register the new pack and begin charging.

Why the LXT276 cuts out mid-transmission on a fresh pack

Pressing PTT pulls a sharp current spike as the radio switches to transmit power. A Ni-MH pack sitting at storage voltage — typically around 4.6V — has not yet conditioned its cells, so internal impedance is higher than normal. That impedance causes a momentary voltage sag under the transmit load. If the sag drops below the radio's undervoltage threshold, the BMS cuts output before the transmission completes. Run one or two full charge-discharge cycles to bring cell impedance down before heavy PTT use.

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

The LXT276 reads battery level using voltage thresholds — it has no fuel gauge chip. A new Ni-MH pack fresh off its first charge may rest at a slightly lower open-circuit voltage than a fully conditioned pack, which pushes it into the next threshold band down. This is not a capacity fault. After two to three full charge cycles, resting voltage stabilises at the correct level and the bar indicator will read accurately. Verify with a multimeter — a fully charged 4.8V Ni-MH pack should read between 5.4V and 5.6V immediately after charge.