Magellan Maestro 1700 GPS Compatible Battery 3.7V 750mAh

Magellan Maestro 1700 — 3.7V Li-ion Replacement Battery (T300-3)

This 3.7V 750mAh Li-ion cell replaces the original battery in the Magellan Maestro 1700 portable GPS navigator. It fits the Maestro 1700 directly, matching the OEM connector and physical footprint. Voltage and capacity align with the original T300-3 specification.

• Maestro 1700 fitment: The Maestro 1700 uses a single-cell Li-ion pack at 3.7V nominal. This cell matches the original connector pinout and physical dimensions — 50.30 x 36.65 x 5.59mm — so it seats correctly in the battery bay without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench and confirmed the protection circuit trips correctly at low-voltage cutoff. The BMS holds charge through a standard USB top-up cycle without false termination.
• First fix after swap: After fitting this cell, power the Maestro 1700 on outdoors and let it acquire a satellite signal before driving. A cold start after full power removal takes 5–10 minutes for first fix. Subsequent warm starts run under a minute once the almanac is cached.

GPS accuracy reduced when the Maestro 1700 battery runs low

At low state of charge — typically below 3.5V — some GPS units reduce RF receiver sensitivity to cut power draw. On the Maestro 1700, this can show up as position drift or a weaker satellite signal bar count. The fix is straightforward: keep the cell above the low-battery threshold during active navigation. Plug into the car charger during long routes so the receiver runs at full sensitivity throughout.

Maestro 1700 shuts off without warning before the battery indicator hits zero

After a replacement swap, the fuel gauge software still references the old cell's discharge curve. The device reads remaining charge against a calibrated baseline that no longer matches the new battery. This causes the shut-off threshold to trigger — usually around 3.6V — before the on-screen indicator reaches the final bar. Run two or three full charge and discharge cycles to let the device recalibrate its voltage-to-percentage mapping.