Golf Buddy Range Finder Compatible Battery 3.7V 1100mAh

Golf Buddy Range Finder / DSC-GB100K — 3.7V Li-ion Replacement Battery

This 3.7V, 1100mAh Li-ion cell replaces the factory battery in the Golf Buddy Range Finder and DSC-GB100K GPS devices. These are handheld golf GPS navigators that display distances to greens, hazards, and course features. Swap this cell in when your unit no longer holds a charge through a full round.

• Range Finder and DSC-GB100K fit: Both models run the same 3.7V single-cell Li-ion supply rail with identical connector orientation and physical footprint — 44.13 × 35.53 × 8.77mm. The BMS in each unit negotiates the same charge termination voltage, so one cell covers both.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a controlled bench rig. The BMS accepted the cell cleanly, hit full charge termination at 4.2V, and the low-voltage cutoff triggered at the expected threshold without any fault flags.
• First satellite fix after battery swap: After a full power interruption the GPS module performs a cold start. Power the unit on outdoors and hold it steady — allow 5–10 minutes for the first satellite fix. Subsequent warm starts resolve in under a minute once almanac data is cached.

GPS accuracy reduced as battery charge drops

Some Golf Buddy units reduce RF receiver sensitivity at low state-of-charge to protect remaining power. When that happens, the unit may still display distance readings but with less positional accuracy — typically showing a degraded satellite count. You'll notice this when distances start feeling inconsistent on holes you know well. Keep the battery above roughly 20% charge during active navigation to maintain full receiver gain.

Unit shuts off without warning before the battery indicator hits empty

A freshly installed cell has not yet been calibrated against the device's voltage-to-percentage fuel gauge. The on-screen indicator still reflects the old battery's discharge curve, so the visual warning may trigger late — or not at all before cutoff. The BMS enforces its own hard cutoff at the low-voltage threshold regardless of what the display shows. Run two full charge-discharge cycles and the gauge will recalibrate to the new cell's actual curve.