Blaupunkt TravelPilot 100 Replacement Battery 3.7V 800mAh

Blaupunkt TravelPilot Series — 3.7V Li-ion Replacement Battery (423450AJ1S1PMX)

This 3.7V, 800mAh Li-ion cell replaces OEM part 423450AJ1S1PMX in the Blaupunkt TravelPilot 100, 200, 1300, and 2310 portable GPS navigators. The original cell in these units degrades after repeated charge cycles, causing premature shutdowns and unreliable satellite sessions. This replacement restores normal GPS operation at the same voltage and capacity as the factory cell.

• TravelPilot 100, 200, 1300, and 2310 compatibility: All four models run the same 3.7V single-cell Li-ion architecture and share the same physical footprint — 52.25 × 34.22 × 4.58mm. The BMS in each unit expects the same voltage curve, so one cell SKU covers the full group without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a TravelPilot unit, monitoring the BMS cutoff at both ends. The protection circuit tripped cleanly at the low-voltage threshold and accepted a full charge without triggering overcurrent flags.
• First satellite fix after fitting: After a full power interruption — which any battery swap causes — the GPS module runs a cold start. Take the unit outdoors and power it on before driving. First fix takes 5–10 minutes; every subsequent fix after that drops to under a minute.

GPS accuracy dropping at low battery on the TravelPilot

As the cell voltage falls toward the BMS cutoff threshold, some TravelPilot units reduce power to the GPS receiver to extend operation. That reduction lowers receiver sensitivity, which means fewer satellites are tracked and position accuracy degrades before the unit actually shuts off. You may notice the map position jumping or lagging slightly in areas where signal is already marginal. Keeping the cell charged above 3.6V avoids this operating mode entirely.

TravelPilot shutting off without a low-battery warning

A degraded original cell loses capacity faster than the battery indicator tracks, so the on-screen gauge still shows bars when the voltage has already dropped below the BMS cutoff point. The unit cuts power abruptly — no warning, mid-navigation. This happens because the indicator is calibrated to a healthy cell's discharge curve, not an aged one. A fresh 800mAh cell restores the correct relationship between displayed charge level and actual available voltage, so shutoffs align with the on-screen warning again.