Golf Buddy CT2 GPS Rangefinder Compatible Battery 3.7V 550mAh

Golf Buddy CT2 / DSC-CT2-100 — 3.7V Li-Polymer Replacement Battery (AEE542730P6H)

This 3.7V, 550mAh Li-Polymer cell replaces the original AEE542730P6H battery in the Golf Buddy CT2 and DSC-CT2-100 GPS rangefinders. These handheld devices use GPS to measure distances to greens and hazards during a round. Swapping a degraded cell restores full operating voltage to the GPS receiver and display.

• CT2 and DSC-CT2-100 compatibility: Both models share the same battery bay dimensions, connector pinout, and 3.7V supply rail. The BMS cutoff and charge termination thresholds are identical across both, so one cell covers either unit.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the CT2 platform. The BMS accepted charge termination cleanly at 4.2V and held low-voltage cutoff without false trips under GPS receiver and display load.
• Cold-start satellite acquisition: After fitting this cell, power the device on outdoors and allow it to acquire a full satellite fix before heading to the first tee. Removing all power clears the GPS receiver's ephemeris data, triggering a cold start that can take 5–10 minutes for first fix — subsequent warm starts drop to under a minute.

GPS accuracy reduced at low battery on the CT2

When cell voltage drops below roughly 3.5V, some CT2 units reduce GPS receiver sensitivity to protect the remaining charge. This shows up as increased distance scatter or slower position updates mid-round. It is not a fault with the receiver itself — it is a power management response. A fresh cell at full charge eliminates the condition immediately.

CT2 shutting off mid-round without a low-battery warning

An aged Li-Polymer cell loses capacity unevenly — the voltage can appear stable on the indicator until the cell hits BMS cutoff threshold suddenly. The CT2's battery gauge is calibrated against a new cell's discharge curve, so a degraded cell reaches cutoff before the on-screen indicator registers critical. The fix is a replacement cell with a full-capacity discharge curve. After fitting this battery, run one full charge cycle before your next round to let the gauge re-calibrate against 4.2V to 3.4V range.