Garmin Approach G30 Replacement Battery 3.7V 700mAh

Garmin Approach G30 — 3.7V Li-ion Replacement Battery (361-00043-02)

This 3.7V 700mAh Li-ion cell replaces the original battery in the Garmin Approach G30 handheld GPS golf navigator (010-01690-00). It restores power to the touchscreen display and GPS receiver used for on-course yardage measurements and scoring. Voltage and capacity match the OEM specification exactly.

• Approach G30 fitment: The G30 uses a dedicated connector and a BMS that checks cell voltage at startup. This replacement cell meets that voltage threshold, so the device boots normally without a low-battery alert on first power-on.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the G30 platform. The BMS accepted the cell without fault codes, and the GPS receiver initialised correctly through each cycle.
• First-fix cold start after swap: After fitting this cell, power the G30 on outdoors before your round. A full power interruption triggers a cold start — allow 5 to 10 minutes for the first satellite fix. Subsequent warm starts lock in under a minute once the almanac data is cached.

Saved courses and round data after a battery swap on the G30

The Approach G30 stores course maps and downloaded content in flash memory, which survives a full battery removal. However, active round data — current hole position, score entries in progress — sits in volatile RAM and clears the moment power drops to zero. If you swap mid-round, that session data is gone. Finish or save any active round before removing the battery.

G30 shutting off without a low-battery warning

The battery indicator on the G30 reads state-of-charge from a voltage curve calibrated to the original cell. After a battery swap, that curve is uncalibrated — the device can hit its hardware cutoff voltage before the on-screen indicator reaches the final warning bar. This is especially noticeable on an aged unit seeing a fresh cell for the first time. Run two full charge and discharge cycles to let the device recalibrate its gauge; the cutoff threshold sits at approximately 3.0V.