IZZO Swami 6000 Golf GPS Compatible Battery HT545256 3.7V 1300mAh

IZZO Swami 6000 — 3.7V Li-Polymer Replacement Battery (HT545256)

This 3.7V 1300mAh Li-Polymer cell replaces part number HT545256 in the IZZO Swami 6000 handheld golf GPS navigator. It slots into the same battery bay as the original and connects to the same BMS circuit. Capacity matches the factory spec at 1300mAh (4.81Wh).

• Swami 6000 fit: The Swami 6000 uses a slim Li-Polymer pouch cell at 3.7V nominal to power its GPS receiver, course map display, and hazard overlay. This cell matches the original footprint at 51.10 × 33.80 × 7.00mm and connects through the same BMS handshake the device expects on boot.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the GPS circuit board. The BMS accepted the charge profile without fault codes, and the protection circuit triggered correctly at the low-voltage cutoff threshold.
• First fix after installation: After fitting this cell, power the unit on outdoors and let it run a full cold-start satellite acquisition before your round. A cold start after full power removal can take 5–10 minutes to lock onto satellites — subsequent warm starts drop back under a minute once the almanac is cached.

GPS accuracy reduced at low battery on the Swami 6000

As cell voltage drops toward the low-voltage cutoff, some GPS units reduce receiver sensitivity to stretch remaining power. On the Swami 6000, this can show up as distance readings that update slowly or jump between values near the end of a round. The GPS receiver needs a stable voltage rail to maintain full signal processing. Keeping the cell above 3.5V during play keeps receiver sensitivity at full spec.

Swami 6000 shuts off without warning mid-round

After a battery swap, the fuel gauge IC on the Swami 6000 has no calibrated state — it hasn't yet learned the new cell's discharge curve. The device can hit its internal voltage cutoff threshold before the on-screen battery indicator reaches one bar. This is a calibration lag, not a defective cell. Run two full charge-to-cutoff cycles outdoors to let the gauge recalibrate and align the visual indicator with actual remaining capacity.