Leadtek 9559x GPS Replacement Battery HXE-W01 3.7V 1000mAh

Leadtek 9559x — 3.7V Li-ion Replacement Battery (HXE-W01)

This 3.7V, 1000mAh Li-ion cell replaces the original HXE-W01 battery in the Leadtek 9559x portable GPS navigator. It restores power to the navigation unit when the original cell no longer holds a usable charge. Dimensions are 52.96 × 33.64 × 5.15mm — measure your existing cell before fitting.

• Leadtek 9559x fit: The 9559x uses a single-cell 3.7V Li-ion pack with a low-current BMS matched to GPS receiver and display draw. This cell runs the same voltage rail and connector, so the unit powers on and charges without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a GPS-class load. The BMS held cutoff at the correct low-voltage threshold and accepted a full charge without triggering protection.
• Cold-start after battery swap: After fitting this cell, power the GPS on outdoors and let it acquire a satellite fix before driving. The unit performs a cold start after any full power interruption — first fix takes 5–10 minutes versus under a minute on a warm start.

GPS accuracy dropping at low battery on the 9559x

Some GPS units reduce receiver sensitivity as cell voltage falls below roughly 3.5V to conserve power. On the 9559x, this shows up as position jumps or a weaker satellite count before the unit shuts off. It is not a signal or antenna fault — it is a deliberate power-saving response in the receiver firmware. Replacing the cell with a fresh 1000mAh unit restores full receiver sensitivity across the charge cycle.

9559x shutting off without a low-battery warning

After years of cycling, the original cell's capacity drops while the unit's voltage-threshold indicator stays calibrated to a new cell. The GPS reads the voltage as acceptable until it suddenly hits the hard cutoff, giving no visual warning before shutdown. The indicator effectively lies because it was never recalibrated to the degraded cell's discharge curve. Fitting a new 1000mAh cell resets the usable voltage window — the low-battery warning appears at the correct point in the discharge cycle again.