SkyGolf SG5 Golf GPS Replacement Battery 3.7V 1100mAh

SkyGolf SG5 Series — 3.7V Li-ion Replacement Battery (BAT-00022-1050)

This is a 3.7V, 1100mAh Li-ion replacement cell for the SkyGolf SG5, SG5 Range Finder, and SkyCaddie SG5 handheld golf GPS units. It matches OEM part number BAT-00022-1050 and fits the original battery compartment at 44.13 × 35.53 × 8.77mm. Swap it in when the original cell no longer holds charge through a full round.

• SG5 platform fit: The SG5, SG5 Range Finder, and SkyCaddie SG5 all share the same battery bay, voltage rail, and connector orientation. One cell covers all three variants — no adapter or wiring change needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS held the 3.7V nominal rail cleanly and engaged the low-voltage cutoff at the expected threshold, with no false trips during load testing at GPS-draw current levels.
• Cold-start preparation after fitting: After installing this cell, power the SG5 on outdoors with a clear sky view before your round. Full power removal triggers a cold GPS start — first satellite acquisition takes 5–10 minutes. Run this once at home, not on the first tee.

GPS accuracy reduced at low battery on the SG5

The SG5 GPS receiver draws more current maintaining satellite lock than most users expect. As cell voltage drops toward the low-battery threshold, the unit reduces receiver sensitivity to extend remaining power. This shows up as slower distance refreshes and slight positional drift — not a satellite issue, a power issue. Keeping the cell above 3.5V prevents the sensitivity rollback from kicking in.

SG5 shuts off without warning mid-round

After fitting a new cell, the SG5's battery indicator may not be calibrated to the new cell's discharge curve. The device reads the voltage level and maps it to a fuel gauge, but that mapping drifts when a new cell is installed. The unit can hit the hardware voltage cutoff — around 3.0V — while the display still shows one bar remaining. Fix this by running two full charge-to-discharge cycles so the firmware recalibrates the low-voltage warning against the actual cell behaviour.