Globalstar BT-001 Compatible Battery 3.7V 180mAh Li-Polymer

Globalstar BT-001 Bluetooth GPS — 3.7V Li-Polymer Replacement Battery

This 3.7V, 180mAh Li-Polymer cell replaces the factory battery in the Globalstar BT-001 Bluetooth GPS and 001 satellite communicator. At 30 × 20 × 4mm, it matches the original footprint exactly. Fit models include the 001, BT-001, and BT-001 Bluetooth GPS.

• BT-001 and 001 platform fit: Both the 001 and BT-001 share the same battery cavity dimensions and 3.7V Li-Polymer voltage rail. The connector orientation and BMS handshake spec are identical across these variants, so the same cell services the full range without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the BT-001 platform. The BMS accepted the cell without fault codes, held charge to rated capacity, and cut off cleanly at the low-voltage threshold — no forced shutdowns during the test cycle.
• Cold-start satellite acquisition after swap: After fitting this cell, power the unit on outdoors in open sky and let it acquire a satellite fix before relying on it. A full power interruption forces a cold start — first fix typically takes 5–10 minutes. Subsequent warm starts drop to under a minute once the almanac is cached.

GPS accuracy dropping at low battery on the BT-001

At low state of charge, the BT-001's receiver section pulls from a sagging voltage rail. Some GPS units respond by reducing receiver sensitivity to protect remaining charge — this shows up as position drift or a wider accuracy radius on screen. The fix is straightforward: keep the cell above the midpoint of its charge cycle during active tracking sessions. A freshly charged 180mAh cell holds the receiver at full sensitivity through a typical use window.

Device shutting off without a low-battery warning

An aged or deeply discharged cell can sit below the calibrated indicator threshold while still powering the display — the unit shows one bar, then cuts off with no further warning. This happens because the voltage-to-capacity curve steepens sharply near depletion on Li-Polymer cells. A new cell recalibrates the effective range the indicator reads against. After fitting the replacement, run two full charge-discharge cycles to let the device re-map the voltage curve accurately.