Magellan Maestro 5300 GPS Replacement Battery 3.7V 1500mAh

Magellan Maestro 5300 / 5310 / Elite 5340 — 3.7V Li-Polymer Replacement Battery (AE473870P)

This 3.7V 1500mAh lithium-polymer cell replaces part number AE473870P in the Magellan Maestro 5300, Maestro 5310, and Maestro Elite 5340 portable GPS navigators. It fits the original battery bay without modification and restores full power to the navigation display and GPS receiver. Dimensions are 71.69 × 37.93 × 4.94mm — measure your original cell before ordering if unsure.

• Maestro 5300 / 5310 / Elite 5340 fit: All three models share the same AE473870P cell format, voltage rail, and connector pinout. The battery management circuit in each unit reads the same charge profile, so no firmware difference affects how this cell charges or discharges across the range.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Maestro platform and confirmed the BMS accepted the cell without error flags. Voltage held steady above the 3.0V cutoff threshold under continuous GPS receiver and display load.
• First fix after installation: After fitting this cell, power the unit on outdoors and let it acquire a satellite fix before driving. A full power interruption clears the GPS receiver's ephemeris data, triggering a cold start — first fix can take 5–10 minutes. Subsequent starts return to under a minute once the almanac rebuilds.

GPS accuracy reduced when battery charge drops below 20%

The Maestro series reduces RF receiver sensitivity at low charge states to extend remaining use time. This shows up as position drift or a fix that jumps several metres even on a clear sky day. The fix isn't recalibration — it's keeping the battery above 3.4V under load. If the display shows one bar of charge and your position looks erratic, plug in and let the unit charge to at least 50% before relying on the route.

Maestro 5300 shuts off without a low-battery warning

This happens when the battery indicator is reading an uncalibrated state — common after a full power removal during battery replacement. The unit's fuel gauge IC loses its reference point and miscalculates remaining charge, so the BMS hits the 3.0V cutoff while the display still shows two or three bars. Run two full charge-to-discharge cycles after fitting the new cell. This resets the fuel gauge baseline and brings the on-screen indicator back in line with actual voltage.