Solarius BT GPS Replacement Battery HXE-W01 3.7V 1000mAh

Solarius BT GPS — 3.7V Li-ion Replacement Battery (HXE-W01)

This is a 3.7V, 1000mAh lithium-ion cell that replaces the original battery in the Solarius BT GPS portable navigator. It fits devices using OEM part number HXE-W01. When the stock cell degrades and the unit loses charge quickly or fails to power on, this is the direct swap.

• Solarius BT GPS fitment: The HXE-W01 cell runs a single-cell 3.7V rail with a compact 52.96 × 33.64 × 5.15mm footprint. The connector and BMS communication match the original spec, so the host device reads charge state correctly without tripping a fault condition.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, confirmed BMS cutoff activates correctly at low voltage, and verified the charge acceptance curve matches the Solarius BT GPS charging circuit without triggering protection flags.
• Cold-start satellite acquisition after swap: After fitting this cell, power the unit on outdoors and let it run until it acquires a satellite fix before navigating. A full power interruption clears the GPS receiver's ephemeris cache, so the first fix after a battery swap takes noticeably longer than a normal warm start.

GPS accuracy reduced at low battery in the Solarius BT GPS

As cell voltage drops toward the lower end of the 3.7V nominal range, some portable GPS units reduce RF receiver sensitivity to stay within power budget. On the Solarius BT GPS, this can show up as position drift or a weaker satellite signal count before the low-battery warning appears. The fix is straightforward — keep the cell above the knee voltage by charging before extended navigation sessions. A degraded original cell hits this threshold much earlier than a fresh replacement cell at full 1000mAh capacity.

Solarius BT GPS shutting off without a low-battery warning

When the original cell ages, its internal resistance rises and voltage sags sharply under the load of active GPS reception and the display. The device's battery indicator reads from open-circuit voltage, not loaded voltage, so it can show two bars and then cut off immediately. This is a calibration mismatch between an aged cell's behaviour and what the firmware expects from a healthy cell. Fitting a fresh HXE-W01 cell restores normal voltage behaviour — the indicator and cutoff threshold realign after one full charge to 4.2V.