About this replacement
Blaupunkt Lucca 5.2 / Travelpilot Lucca — 3.7V Li-ion Replacement Battery (7612201334)
This 3.7V, 2600mAh Li-ion cell replaces the original battery in the Blaupunkt Lucca 5.2 and Travelpilot Lucca portable GPS navigators. It matches the OEM part numbers 7612201334, ICR186501S1PSPMX, and SDI1865L2401S1PMXZ. Fit the new cell and the navigator powers on and operates as it did with the factory battery.
- Lucca 5.2 and Travelpilot Lucca compatibility: Both models run the same 3.7V single-cell architecture with an identical connector and BMS handshake. The navigator will not power on if the BMS negotiation fails, so the cell must match that voltage rail and communication protocol exactly — this one does.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the Lucca platform, confirmed BMS recognition at power-on, and verified the navigator held its charge state correctly at rest. The protection circuit tripped cleanly at the lower cutoff threshold with no false shutdowns above it.
- First fix after swap: After fitting this cell, power the navigator on outdoors and let it run a full satellite acquisition before use. A full power removal triggers a cold start — first fix takes 5–10 minutes as the unit rebuilds its almanac. Subsequent starts drop back under a minute once the almanac is cached.
GPS accuracy reduced at low battery on the Lucca 5.2
As cell voltage drops toward the lower threshold, the Lucca 5.2 reduces power to the GPS receiver module to extend operation time. That reduction lowers receiver sensitivity, which means weaker satellite signals get dropped first. The result is fewer satellites tracked and larger position error — the map may show you half a street away from your actual position. Keeping the cell above 3.6V during active navigation avoids this sensitivity reduction entirely.
Navigator shuts off without warning before the low-battery indicator appears
The on-screen battery indicator in the Lucca platform is calibrated against the original cell's discharge curve. A degraded or replacement cell with a slightly different curve can hit the hardware voltage cutoff before the software-side indicator shows critical. The navigator cuts power abruptly — no warning screen, no graceful shutdown. After fitting this replacement, run two or three full charge-to-use cycles so the firmware recalibrates its discharge reading against the new cell's actual curve.