Xplova G3 GPS Navigator Replacement Battery 3.7V 1100mAh

Xplova G3 — 3.7V Li-ion Replacement Battery

This is a 3.7V 1100mAh Li-ion cell for the Xplova G3 cycling GPS navigator. It fits directly into the G3 unit and restores power to navigation, speed tracking, and route logging functions. Voltage and capacity match the original cell specification.

• G3 navigator fit: The G3 runs a single-cell 3.7V Li-ion architecture with a compact flat-pack form factor — 53.09 × 33.78 × 5.70mm. This cell matches that footprint and voltage rail, so the BMS reads charge state correctly without reconfiguration.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, confirmed the protection circuit trips at the correct cutoff voltage, and verified the BMS communicates charge state to the G3 display without error flags.
• Cold-start satellite acquisition after swap: After fitting this cell, power the G3 on outdoors before your first ride. GPS units perform a cold start after full power removal — first satellite fix can take 5–10 minutes. Subsequent warm starts drop that to under a minute once the almanac is cached.

GPS accuracy dropping at low battery on the G3

Some GPS receivers reduce radio-frequency receiver sensitivity as cell voltage drops toward the lower cutoff threshold. On the G3, this can show as position drift or slower track updates in the final portion of a ride. The receiver pulls back power to the RF front-end to stay alive longer, which trades fix accuracy for battery conservation. Keeping the cell above 3.5V under load avoids this behaviour.

G3 shutting off without low-battery warning

This happens when the fuel gauge or voltage indicator loses calibration — usually after a replacement cell is fitted with a different internal resistance profile than the original. The G3 reads remaining capacity based on voltage curve, and if the curve shifts, the cutoff threshold is hit before the on-screen warning fires. Run the G3 through two full charge and discharge cycles after fitting this cell. That allows the firmware to re-map the voltage curve and trigger the warning at the correct level again.