Belkin Bluetooth GPS Receiver 3.7V 900mAh Replacement Battery

Belkin Bluetooth GPS Receiver — 3.7V Li-ion Replacement Battery (300-203712001)

This 3.7V 900mAh Li-ion cell replaces the internal battery in the Belkin Bluetooth GPS Receiver. That device pairs wirelessly with smartphones and tablets to deliver real-time location data without a built-in screen. When the original cell degrades, the receiver loses its ability to hold charge and drops sessions mid-navigation.

• Belkin Bluetooth GPS Receiver fit: This compact receiver runs its Bluetooth radio and SiRF GPS chipset from a single low-voltage Li-ion cell. The 3.7V nominal rail and physical footprint of 52.90 × 32.50 × 7.50mm match the OEM cell directly. No wiring modifications are needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS held the charge termination voltage at 4.2V and protected against over-discharge below 3.0V without tripping prematurely under the receiver's combined GPS and Bluetooth draw.
• Cold-start satellite acquisition after fitting: After any full power removal, the GPS receiver loses its ephemeris data and must perform a cold start. Take the device outdoors immediately after fitting the new cell and power it on. First satellite fix takes 5–10 minutes. Subsequent warm starts run under a minute once the almanac is rebuilt.

GPS accuracy dropping at low battery on the Belkin receiver

The SiRF-based chipset in this receiver pulls more current during active satellite tracking than during position hold. At low cell voltage — typically below 3.4V — the receiver reduces RF front-end sensitivity to stay within power budget. That reduction narrows the satellite pool it can lock onto, which degrades position accuracy. Keeping the cell above 3.6V during active use maintains full receiver sensitivity and HDOP values.

Device shutting off without any low-battery warning

An aged original cell develops internal resistance that causes voltage to sag rapidly under the combined Bluetooth and GPS load. The BMS cutoff threshold triggers before the device's low-battery indicator has time to display. The result is an abrupt shutdown with no warning. A new cell with lower internal resistance eliminates that voltage sag, and the low-battery indicator will appear correctly before cutoff — typically at 3.5V under load.