Fortuna HXE-W01 GPS Navigator Compatible Battery 3.7V 1000mAh

Fortuna HXE-W01 — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1000mAh Li-ion cell built to replace the original battery in Fortuna portable GPS navigators. It fits units using the HXE-W01 cell. Voltage and capacity match the original spec exactly.

• Fortuna GPS navigator fit: Fortuna handheld GPS units in this range share the HXE-W01 cell format — same connector, same voltage rail, same BMS communication. Swapping to this cell requires no modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on GPS-class hardware. The BMS held cutoff at the correct low-voltage threshold and accepted a full charge without thermal event or over-voltage fault.
• Cold-start after power interruption: After fitting this cell, power the GPS fully on outdoors before navigating. A full power removal forces a cold start — the receiver has lost its last known position and almanac cache, so first satellite acquisition takes longer than a normal warm start. Let the unit acquire a fix before you move off.

GPS battery draining faster on active navigation than standby

Active navigation runs the GPS receiver and display simultaneously, which draws significantly more current than standby. On a 1000mAh cell at 3.7V, that combined load is the primary drain factor. Screen brightness has a measurable effect — full brightness can double display current draw compared to mid-brightness. If drain seems excessive, check whether the backlight timeout is set or if the screen stays on continuously during navigation.

GPS shutting off without warning before the battery indicator hits empty

After a full power removal and reinstall, the fuel gauge on the GPS unit loses its calibration reference. The device reads estimated charge from voltage curves, not a tracked capacity state. Under load, voltage sags earlier than the indicator predicts, so the low-battery threshold is hit before the visual warning has time to display. Run two full charge-to-cutoff cycles to let the unit recalibrate its voltage-to-charge mapping. After that, shutoff and warning should align.