About this replacement
Garmin Nuvi 2555LMT / 2495LMT Series — 3.7V Li-ion Replacement Battery (361-00035-03)
This is a 3.7V, 1200mAh Li-ion cell replacing OEM part 361-00035-03 and 361-00035-07 in the Garmin Nuvi 2555LMT and related portable GPS navigators. It fits the compact battery bay on the Nuvi 2555LMT, 2555LT, 2495LMT, and 2475LT among 22 additional Nuvi variants. Capacity matches the original at 4.44Wh — no modification needed to fit or connect.
- Nuvi 2400/2500 series compatibility: These models share the same 3.7V single-cell architecture, connector pinout, and BMS communication protocol, which is why one cell covers the full range. Swapping to a different voltage or a non-communicating cell trips the BMS and prevents charging.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Nuvi 2555LMT unit and confirmed BMS handshake, stable charge acceptance at 4.2V cutoff, and correct low-battery threshold signalling to the device firmware.
- Cold-start satellite acquisition after swap: After fitting this battery, power the unit on outdoors before driving and let it acquire a satellite fix from a stationary position. A full power interruption triggers a cold start — the GPS almanac must rebuild, and first fix outdoors from cold can take 5–10 minutes. Subsequent warm starts drop to under a minute.
Why the Nuvi 2555LMT shuts off without warning at apparent mid-charge levels
The Nuvi's battery indicator is calibrated against the voltage curve of the original cell. An aged or replacement cell with a slightly different discharge curve causes the indicator to misread state of charge. The firmware triggers shutdown at a voltage threshold — typically around 3.2V — regardless of what the on-screen percentage shows. After fitting this replacement, run two full charge-discharge cycles to let the firmware recalibrate its voltage-to-percentage mapping and restore accurate low-battery warnings.
Saved routes and favourites missing after battery replacement
Some Nuvi models hold recent route history and certain user settings in battery-backed volatile RAM — not in flash storage. When the battery is fully removed, power to that RAM drops to zero and the data clears. Favourites and saved places stored to internal flash survive the swap; actively loaded routes or unsaved recent destinations do not. Before removing the old battery, navigate to the Favourites menu and confirm your key locations are saved to the device — those will persist through the swap intact.