Garmin Approach G7 Compatible Battery 3.7V 1000mAh

Garmin Approach G7 — 3.7V Li-ion Replacement Battery (KH44BH48D6DE5)

This is a 3.7V, 1000mAh Li-ion cell for the Garmin Approach G7 GPS golf watch. It replaces part number KH44BH48D6DE5 and fits the Approach G7 directly. Capacity matches the original spec at 3.7Wh.

• Approach G7 fitment: The G7 uses a slim pouch cell sized at 52 x 34 x 6mm to fit inside the watch housing without clearance issues. The BMS on this unit handles the G7's combined GPS receiver and display load, which draws more current during active course navigation than during standby.
• Bench tested on actual hardware: We cycled this cell through GPS-active and standby draw profiles. The BMS held voltage within spec across both states and did not trip under the GPS receiver's periodic position update bursts.
• Cold-start satellite acquisition after installation: After fitting this cell, power the G7 on outdoors and let it acquire a satellite fix before heading to the first tee. The watch performs a cold start after any full power interruption — first fix typically takes 5 to 10 minutes versus under a minute on subsequent warm starts.

GPS accuracy reduced at low battery on the Approach G7

When cell voltage drops toward the lower threshold, the Approach G7 reduces GPS receiver sensitivity to conserve power. This means distance readings and course position can drift slightly in the final portion of a round. The fix is straightforward — a fresh cell running at full voltage keeps the receiver operating at full sensitivity. If accuracy issues appear mid-round, check that the battery indicator is not already at one bar before you tee off.

Approach G7 shuts off without a low-battery warning

After a battery swap, the G7's fuel gauge algorithm takes one or two full charge cycles to recalibrate to the new cell. Until it does, the displayed battery percentage can be inaccurate — the watch hits the hardware voltage cutoff before the visual warning triggers. Run two complete charge and discharge cycles after installation. The indicator will align to the actual cell state once the internal calibration catches up to the new cell's discharge curve.