Navigon 3300 GPS Replacement Battery 3.7V 1200mAh

Navigon 3300 / 3310 Series — 3.7V Li-Polymer Replacement Battery (8390-YE01-0780)

This 3.7V, 1200mAh Li-Polymer cell replaces the original battery in the Navigon 3300, 3310, 3310 MAXE, and 4310 portable GPS navigators. It matches the OEM voltage and physical dimensions (59.47 × 37.00 × 5.05mm) required for these units. Capacity figures are taken directly from product data — 4.44Wh total.

• 3300 / 3310 / 4310 platform fit: These models share the same battery bay dimensions and connector pinout. The BMS handshake on this series uses a simple two-wire configuration — no authentication chip — so swapping cells does not trigger a compatibility lockout on power-up.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 3310 platform. The protection circuit responded correctly to over-discharge conditions, cutting output at the expected low-voltage threshold and recovering cleanly on reconnect to a charger.
• Cold-start after power interruption: After fitting this cell, power the unit on outdoors before driving. A full power removal forces a GPS cold start — the receiver has lost its last known position and almanac cache. Acquiring a first satellite fix outdoors at rest gives the unit the clean lock it needs before navigation begins.

Why the Navigon 3300 shuts off without a low-battery warning

The 3300's battery indicator reads cell voltage, not true state of charge. A degraded original cell develops high internal resistance — voltage looks acceptable at low draw but collapses the moment the GPS receiver and display pull current together. The unit hits its cutoff threshold in milliseconds, with no time to display a warning. A new cell with lower internal resistance holds voltage stable under that combined load, so the indicator has time to step down through the warning levels before shutdown.

Saved routes and favourites missing after battery replacement

The Navigon 3300 stores user data — saved destinations, recent routes, and some settings — in RAM that depends on battery power to retain its contents. A complete power removal, such as a battery swap, clears that volatile memory. POIs and favourites stored on the internal flash survive the swap, but route history and unsaved destinations do not. Before removing the old battery, export any saved routes to the SD card via the device menu to avoid losing them permanently.