BlueMedia BM6300 GPS Navigator Replacement Battery 3.7V 1400mAh

BlueMedia BM6300 Series — 3.7V Li-ion Replacement Battery (E3MT07135211)

This 3.7V, 1400mAh Li-ion cell replaces the original battery in the BlueMedia BM6300 GPS navigator. It fits the BM6300, BM6300T, PNA 150, and PNA-3002, among other models in the same platform family. OEM part number E3MT07135211 matches the original connector and BMS profile for a direct swap.

• BM6300 platform fit: The BM6300, BM6300T, PNA 150, and PNA-3002 share the same 3.7V single-cell architecture and battery bay dimensions. The connector pinout and BMS communication protocol are identical across these models, so one cell covers the full group.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on GPS navigator hardware. The BMS accepted full charge termination cleanly, held the 3.7V nominal rail under GPS receiver and display load, and triggered low-voltage cutoff at the expected threshold without false trips.
• Cold-start satellite acquisition after swap: After fitting this cell, power the BM6300 on outdoors before your first drive. A full power interruption forces a cold start — the GPS receiver has lost its ephemeris data and needs 5–10 minutes to reacquire satellite lock. Subsequent warm starts take under a minute once that data is cached again.

GPS accuracy dropping at low battery on the BM6300

As the BM6300's battery voltage drops toward the low-voltage cutoff threshold, the device firmware reduces power to the GPS receiver to extend operation. That power reduction lowers receiver sensitivity, which means weaker satellite signals get dropped first. The result is fewer satellites in the fix, wider position error, and occasional position jumps on the map. Keeping the cell above 3.5V — or recharging before the low-battery indicator appears — keeps the receiver running at full sensitivity.

BM6300 shutting off without a low-battery warning

This happens when the battery gauge in the navigator is uncalibrated after a cell swap. The fuel gauge circuit learned the old cell's discharge curve, so it reads the new cell's state of charge incorrectly — showing two bars of power right up until the BMS hits the hardware cutoff voltage. To recalibrate, charge the unit fully to 4.2V, then let it discharge in navigation mode without interruption until it powers off on its own. One full cycle is usually enough to reset the gauge to the new cell's actual capacity.