Wintec G-Trender GPS Navigator Replacement Battery 3.7V 1000mAh

Wintec G-Trender / WBT-100 / WBT-200 / WBT-201 — 3.7V Li-ion Replacement Battery

This is a 3.7V 1000mAh Li-ion cell for the Wintec G-Trender GPS navigator and the WBT-100, WBT-200, and WBT-201 series. It fits the same battery bay, connector, and BMS interface across all four models. Capacity is rated at 3.7Wh, matching the original cell specification.

• G-Trender / WBT series compatibility: All four models share the same 3.7V single-cell architecture, connector pinout, and BMS communication protocol. The battery bay dimensions — 52.96 × 33.64 × 5.15mm — are identical across the range, so one cell fits all without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the WBT platform and monitored BMS cutoff behaviour. The protection circuit tripped correctly at low-voltage threshold and accepted a full charge cycle without fault flags.
• Cold-start satellite acquisition after swap: After fitting this cell, power the unit on outdoors and let it acquire a satellite fix before heading out. GPS navigation devices run a cold start after any full power interruption — first fix typically takes 5–10 minutes. Subsequent warm starts drop back under a minute once almanac data is restored.

GPS accuracy reduced at low battery on the G-Trender

At low state of charge, some GPS receivers step down receiver sensitivity to reduce current draw and extend operation. On the G-Trender this can appear as wider position scatter or slower track updates before the unit shuts off. It is not a firmware fault — it is the receiver managing power at the cell's lower voltage boundary. Keeping the cell above 3.6V under load maintains full receiver sensitivity.

G-Trender shuts off without warning before the battery indicator reaches empty

The fuel gauge on the G-Trender reads state of charge from a voltage curve calibrated to the original cell. A new or different cell may have a slightly different discharge curve, so the indicator can read one bar and still cut off abruptly. This is a calibration lag in the gauge, not a fault with the cell. Run two or three full charge-discharge cycles and the indicator will recalibrate — cutoff should align closer to the 3.4V low-voltage threshold.