Navman Pin GPS Replacement Battery 3.7V 1700mAh

Navman Pin / Praktiker LooxMedia 6500 — 3.7V Li-ion Replacement Battery (541380530006)

This 3.7V, 1700mAh Li-ion cell replaces the original battery in the Navman Pin and Praktiker LooxMedia 6500 portable GPS navigators. It matches the OEM cell dimensions at 50 x 35 x 7mm, seating flush in the battery bay without modification. Voltage and capacity figures are taken directly from the product data — not estimated.

• Pin and LooxMedia 6500 compatibility: Both devices share the same battery bay dimensions, connector pinout, and 3.7V nominal rail, which is why a single cell covers both. The BMS protection circuit in this cell handles the same charge and discharge thresholds as the original.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a GPS navigator platform. The BMS engaged correctly at low-voltage cutoff and the protection circuit did not trip during normal GPS receiver and display load.
• Cold-start satellite acquisition after fitting: After installing this battery, power the unit on outdoors before driving. A full power interruption clears the GPS receiver's ephemeris cache, triggering a cold start. First satellite fix can take 5–10 minutes in open sky — subsequent fixes return to under a minute once the cache rebuilds.

GPS accuracy reduced when battery level drops below 20%

Some Navman portable GPS units reduce receiver sensitivity at low battery to cut power draw, which degrades position accuracy before the device shuts off. This shows up as route drift or hesitant turn-by-turn updates in the final minutes of a charge cycle. A degraded original battery accelerates this — the device enters low-power mode earlier because the cell's usable voltage window has shrunk. Keeping the cell above 3.6V under load avoids the sensitivity reduction entirely.

Device shuts off without a low-battery warning

The battery indicator on the Navman Pin reads state-of-charge from a voltage curve calibrated to the original cell. After a battery swap, the indicator is uncalibrated — it can show one bar remaining right up until the BMS hits its cutoff threshold and the unit goes dark. Run two or three full charge-to-cutoff cycles and the on-screen gauge will re-align to the new cell's discharge curve. Until then, plug in for charging when the indicator shows 30% to avoid unexpected shutoffs mid-route.