Magellan Maestro 3000 GPS Replacement Battery 3.7V 1100mAh

Magellan Maestro 3000 / 3200 Series — 3.7V Li-ion Replacement Battery (T0052)

This 3.7V, 1100mAh Li-ion cell replaces the OEM T0052 battery in the Magellan Maestro 3000, 3200, 3210, and 3215 GPS navigators, along with five additional Maestro variants. It powers the GPS receiver, processor, and LCD display. Dimensions are 53.90 × 34.70 × 5.20mm — same footprint as the original cell.

• Maestro 3000/3200 platform fit: These models share a common PCB layout, connector pinout, and BMS handshake protocol, which is why a single cell — the T0052 — covers the full range. Voltage rail and physical form factor are identical across all listed variants.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Maestro 3200 unit. The BMS accepted the cell without error flags, charge termination triggered correctly at 4.2V, and the protection circuit responded normally to over-discharge conditions.
• First satellite fix after installation: After fitting this cell and powering on, take the unit outdoors before first use. A full power interruption clears the GPS receiver's ephemeris cache, triggering a cold start. First fix typically takes 5–10 minutes in open sky; subsequent warm starts resolve in under a minute.

Saved routes and POIs disappearing after battery swap

The Maestro series stores certain navigation data — including recent destinations and some route history — in battery-backed RAM. When the cell is fully removed, that volatile memory loses power and the data clears. Saved favourites stored in flash memory are typically retained, but recent route history and any unsaved POIs may not survive a full power removal. Before swapping the battery, export or note any routes you need to keep via the device's save function.

GPS shuts off without warning before the battery indicator hits empty

The Maestro's battery indicator is calibrated to the discharge curve of the original cell. A replacement cell with a slightly different curve can cause the device to hit its low-voltage cutoff threshold before the on-screen indicator reaches one bar. The unit cuts power to protect the cell — it is not a fault with the battery. To recalibrate the indicator, run two full charge-to-discharge cycles: charge to 4.2V, use the device in active navigation until automatic shutoff, then charge fully again.