HP BT GPS 3.7V 1000mAh Li-ion Compatible Battery

HP BT GPS — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1000mAh Li-ion cell for the HP BT GPS portable navigator. It replaces the original battery when capacity has dropped or the unit no longer holds a charge. Dimensions are 52.02 × 35.09 × 5.26mm — check these against your existing cell before fitting.

• HP BT GPS platform fit: The BT GPS line runs a single-cell 3.7V Li-ion pack at this compact footprint. The voltage rail and connector match the original spec, so the BMS handshake between battery and device completes without flagging a fault on startup.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the BT GPS platform. The BMS accepted the cell, charged to full without dropping into error state, and the unit powered on cleanly at each stage of the cycle.
• Cold-start after power interruption: After fitting this cell, power the unit on outdoors before your first navigation session. The GPS performs a cold satellite acquisition after any full power removal — first fix takes 5–10 minutes. Subsequent warm starts run under a minute once the almanac is rebuilt.

GPS accuracy reduced at low battery on the BT GPS

At low state of charge, some GPS units pull back receiver sensitivity to reduce current draw and extend remaining power. On the BT GPS, this can show up as degraded position accuracy or slower fix updates while the battery indicator still shows a bar or two. The root cause is the receiver scaling back its signal processing, not atmospheric interference. Keep the cell charged above 3.5V during active navigation to avoid this behaviour.

BT GPS shuts off without warning before the battery indicator hits empty

This happens when the unit's low-battery indicator is calibrated to an aged original cell — the voltage curve on a fresh cell is steeper, so the device hits its hardware cutoff threshold before the on-screen warning fires. The GPS cuts power at approximately 3.0V to protect the cell. After a few full charge cycles on the new battery, the indicator recalibrates to match the fresh cell's discharge curve and warnings reappear at the correct point.