About this replacement
Garmin Nuvi 760 / 710 Series — 3.7V Li-Polymer Replacement Battery (361-00019-11)
This 3.7V, 1250mAh lithium-polymer cell replaces the original battery in the Garmin Nuvi 760, Nuvi 760T, Nuvi 710, and Nuvi 710T portable GPS navigators. It matches the OEM voltage rail and physical footprint of part number 361-00019-11 and 361-00019-40. Fit the cell when the original no longer holds a charge or causes unexpected shutdowns during navigation.
- Nuvi 760 and 710 platform fit: Both the 760 and 710 lines share the same battery bay dimensions, connector pin-out, and BMS charge profile — that is why one cell covers both series. The 59.89 × 36.36 × 4.87mm pack slots into the bay without modification, and the protection circuit communicates charge state directly to the Nuvi's power management IC.
- Bench tested on actual hardware: We seated the cell in a Nuvi 760 and cycled it through three full charge and discharge passes. The BMS held the charge termination voltage at 4.2V and tripped the low-voltage cutoff at approximately 3.0V without any thermal anomalies or charge refusal from the unit.
- Cold-start after power interruption: After fitting this cell, power the Nuvi fully on outdoors and let it acquire a satellite fix before driving. Removing the battery clears the GPS receiver's ephemeris data, which forces a cold start. First fix after a battery swap typically takes 5–10 minutes; subsequent warm starts return to under a minute once that data rebuilds.
Why the Nuvi 760 shuts off without warning at low battery
The Nuvi 760 uses a voltage-threshold method to estimate remaining capacity and trigger the on-screen battery indicator. When the original cell ages, its internal resistance rises. Under load — active GPS reception plus screen backlight — the terminal voltage sags faster than the indicator tracks. The device hits its hard cutoff voltage before the visual warning has time to appear. A fresh cell with lower internal resistance reduces that voltage sag under load, keeping the terminal voltage above the cutoff threshold long enough for the low-battery icon to register.
Saved routes and favourites missing after battery swap
The Nuvi 760 stores saved locations and favourites in flash memory, but active route data and recently calculated routes sit in battery-backed RAM. A full power removal — which happens during a battery swap — clears that RAM contents entirely. Saved favourites and custom POIs stored in flash will survive; anything in an active or paused route calculation will not. Before swapping the cell, export any critical routes via Garmin's trip-planning tools, then reload them after the new battery is fitted and the unit has rebooted cleanly.