About this replacement
Midland GXT2000 Series — 7.4V Li-Polymer Replacement Battery (BATT12Li)
This 7.4V, 1200mAh Li-Polymer battery replaces the BATT12Li pack in the Midland GXT2000, GXT2050, G7 Pro, and Pb-Pro two-way radios. It fits the same battery bay and uses the same connector and BMS handshake as the original. Capacity is taken directly from the product specification — 1200mAh at 7.4V nominal.
- GXT2000 and GXT2050 series fit: These models share the same battery bay geometry, connector pinout, and BMS communication protocol. That shared platform means one pack covers all of them without adapter modifications or firmware conflicts.
- Bench tested on actual hardware: We cycled this pack through transmit loads on the GXT2000. The BMS handled PTT-triggered current spikes without entering overcurrent lockout. Cell voltage held above the protection threshold under sustained RF output.
- Contact strip care on first dock insertion: If the charger shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The GXT charger dock requires a clean contact surface to complete the BMS handshake before it will begin the charge cycle.
Why the GXT2000 cuts out mid-transmission on a new BATT12Li pack
A new Li-Polymer cell ships at storage voltage — typically around 3.7V per cell, not the 4.2V full-charge peak. When you press PTT on a pack that hasn't been fully charged first, the transmit current draw pulls cell voltage below the BMS low-voltage cutoff threshold. The radio goes silent mid-call and the battery appears dead. Charge the pack fully before the first use — wait for the dock LED to confirm a completed charge cycle, then transmit.
Bar indicator showing one fewer bar than expected after a full charge
The GXT2000 uses a voltage-threshold bar indicator, not a fuel gauge chip. If the pack was seated on the dock before the charger completed its full cycle, the resting voltage at the radio's sense pin may read slightly below the threshold for the top bar. Remove the pack, let it rest off the dock for two minutes, then reinsert it in the radio. A fully charged BATT12Li should rest at approximately 8.4V and register a full bar display.