Navigon 2100 Max GPS Replacement Battery 3.7V 1200mAh

Navigon 2100 Max / 2120 Max Series — 3.7V Li-Polymer Replacement Battery (03028)

This 3.7V, 1200mAh lithium-polymer cell replaces the original battery in the Navigon 2100 Max, 2120, 2120 Max, and 2110 Max portable GPS navigators. It matches the original cell's dimensions (59.12 × 36.05 × 4.66mm) and voltage rail, so the device powers on without modification. Capacity figures are taken directly from the product data — 1200mAh / 4.44Wh.

• 2100 Max and 2120 series fit: These models share the same battery bay geometry, 3.7V supply rail, and OEM part number 03028. The connector orientation and BMS handshake are identical across the series, so one cell covers all listed variants.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 2100 Max platform. The BMS reached full charge cutoff cleanly, and low-voltage protection triggered at the expected threshold with no spurious shutdowns during the test cycle.
• First satellite fix after fitting: After a full power interruption from a battery swap, the Navigon 2100 Max performs a cold start. Power the unit on outdoors and allow it to acquire a satellite fix before driving — cold start acquisition typically takes 5–10 minutes versus under a minute for a subsequent warm start.

GPS accuracy dropping at low battery on the 2100 Max

When the 2100 Max cell voltage drops toward its lower threshold, some units reduce GPS receiver sensitivity to conserve power. This shows up as positional drift or a weaker satellite signal bar count — not a hardware fault in the receiver itself. The fix is straightforward: keep the cell above 50% state of charge during active navigation. A depleted or heavily degraded original battery accelerates this behaviour, which disappears once a fresh cell holds voltage under normal draw.

Device shuts off without warning before the battery indicator hits zero

The 2100 Max battery indicator is calibrated to the original cell's discharge curve. After a battery swap — especially if the new cell has a slightly different internal resistance — the fuel gauge loses its reference point and the displayed percentage no longer matches real state of charge. The unit hits the BMS low-voltage cutoff while the indicator still reads 15–20%. Run two full charge-to-cutoff cycles after fitting the new cell; the device re-calibrates its gauge against the actual discharge curve and the shutoff warning returns to the correct point.