HXE-W01 PPurple Grid K2 GPS Navigator Replacement Battery 3.7V 1000mAh

PPurple Grid K2 — 3.7V Li-ion Replacement Battery (HXE-W01)

This is a 3.7V, 1000mAh Li-ion replacement cell for the PPurple Grid K2 portable GPS navigator. It matches the OEM part number HXE-W01 and fits the original battery bay without modification. Capacity is 1000mAh (3.7Wh) — identical to the factory specification.

• Grid K2 fitment: The Grid K2 uses a single-cell Li-ion pack at 3.7V nominal. The BMS inside the device monitors cell voltage directly — any cell outside the accepted voltage window triggers a low-battery shutdown before the indicator reaches empty. This replacement cell operates within that window.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, monitoring BMS handshake and cutoff behaviour. The protection circuit engaged correctly at the low-voltage threshold with no false trips during normal GPS draw.
• First fix after installation: After fitting this cell, power the Grid K2 on outdoors and let it acquire a satellite fix before use. A full power interruption wipes the ephemeris data, so the unit performs a cold start — expect 5 to 10 minutes for the first lock versus under a minute for subsequent warm starts.

GPS accuracy reduced at low battery on the Grid K2

When cell voltage drops toward 3.4V, some GPS units reduce RF receiver gain to cut current draw and extend operation. On the Grid K2, this appears as position drift or a wider accuracy radius — the satellite count stays the same but signal quality degrades. A degraded original cell that sags under load hits this threshold earlier than its state-of-charge indicator suggests. A fresh cell holds voltage above 3.6V under typical GPS receiver and display load, keeping receiver sensitivity at full rating.

Grid K2 shuts off without warning before the low-battery icon appears

This happens when the original cell has developed high internal resistance — it passes enough voltage at rest to show a partial charge reading, but sags below the BMS cutoff threshold the moment GPS receiver and display load is applied. The low-battery indicator never gets the chance to display. After fitting a replacement cell, recalibrate the indicator by running the Grid K2 from a full charge through to automatic shutdown once — this lets the device relearn the actual voltage curve of the new cell.