SkyGolf SkyCaddie Aire Replacement Battery H503448 3.7V 850mAh

SkyGolf SkyCaddie Aire Series — 3.7V Li-Polymer Replacement Battery (H503448 1S1P)

This 3.7V 850mAh Li-Polymer cell replaces the original battery in the SkyGolf SkyCaddie Aire, Aire II, Aire 2, and X8F handheld golf GPS navigators. All four devices share the same battery bay geometry and BMS handshake protocol, so one cell covers the full Aire lineup. Capacity is 850mAh (3.15Wh) — match the original spec exactly.

• Aire, Aire II, Aire 2, and X8F compatibility: These four models run on the same 3.7V single-cell architecture with an identical connector pinout and BMS communication line. The protection circuit on this cell matches the voltage thresholds the device firmware expects, so the charge indicator and low-battery alert behave as they did with the factory cell.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an Aire unit. The BMS engaged correctly at both the overcharge ceiling and the low-voltage cutoff floor, and the device reported battery status accurately through each cycle without triggering a false low-battery warning.
• First-power protocol after fitting: After installing this cell, take the device outdoors and power it on before your round. GPS units perform a cold start after any full power interruption — first satellite acquisition can take 5–10 minutes in open sky. Running this cold start before you need yardages prevents delays on the first tee.

SkyCaddie Aire shutting off without warning before the battery indicator reads empty

The Aire's fuel gauge is calibrated against the original cell's discharge curve. When the original cell ages and its actual capacity drops, the device loses its reference point and the fuel gauge reads optimistically high. A replacement cell restores the correct capacity baseline, but the gauge needs a full charge-to-discharge cycle to recalibrate against the new cell's curve. Run one complete cycle — charge to 100%, use until automatic cutoff — and the low-battery warning will re-anchor to the correct voltage threshold near 3.2V.

Saved courses missing from the SkyCaddie after battery removal

The Aire stores downloaded course data in onboard flash memory, not in battery-backed RAM, so course maps themselves survive a full power interruption. However, device settings, last-used course, and round data in progress are held in volatile memory and will clear when power drops to zero. Before removing the battery, finish or save any active round through the menu. After fitting this cell and powering back on, re-sync with the SkyGolf app if the device prompts for a course data refresh.