i.Trek HXE-W01 Bluetooth GPS Replacement Battery 3.7V 1000mAh

i.Trek Bluetooth GPS Receiver — 3.7V Li-ion Replacement Battery (HXE-W01)

This is a 3.7V, 1000mAh Li-ion cell for the i.Trek Bluetooth GPS Receiver range, including the M1, M1 BT GPS, and M6. It fits the HXE-W01 platform and restores power to the GPS receiver and Bluetooth radio. Voltage and cell dimensions match the original at 52.96 × 33.64 × 5.15mm.

• M1, M1 BT GPS, M6 platform fit: These models share the HXE-W01 battery format — same voltage rail, same physical footprint, and the same connector orientation. Swapping between them requires no adapter or modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the HXE-W01 platform. The BMS accepted the cell without fault codes, and the Bluetooth radio paired correctly at full and low charge states.
• First fix after battery swap: After fitting this cell, power the unit on outdoors and let it run a full cold start. With no satellite almanac cached, the first fix takes 5–10 minutes. Subsequent warm starts drop to under a minute once the almanac is written back to memory.

GPS accuracy dropping as battery level falls

Some GPS receivers reduce radio sensitivity at low battery to protect the BMS from voltage sag under full receiver load. On the HXE-W01 platform, this appears as position drift or wider accuracy circles rather than a clean signal loss. The fix is straightforward — keep the cell above 3.5V during active navigation. If accuracy degrades before the low-battery indicator fires, the cell has aged past useful capacity and needs replacement.

Device shuts off without warning during navigation

The on-screen battery indicator on these receivers is calibrated to the original cell's discharge curve. A new or aged cell can throw that calibration off, meaning the unit hits its protection cutoff voltage — typically around 3.0V — before the indicator shows a low-battery warning. If this happens, charge the unit fully, then run a complete discharge cycle in active GPS mode to let the indicator recalibrate to the new cell. After one full cycle, the warning should fire before the BMS trips.