Prestigio RoadRunner 300 Replacement Battery 3.7V 660mAh

Prestigio RoadRunner 300 — 3.7V Li-ion Replacement Battery

This is a 3.7V 660mAh Li-ion cell for the Prestigio RoadRunner 300 dash camera. It replaces the internal battery that powers the DVR recorder during driving, parking mode standby, and loop recording. Dimensions are 40.00 × 31.10 × 5.90mm — confirm these against your existing cell before ordering.

• RoadRunner 300 fitment: The RoadRunner 300 uses a slim single-cell pouch format at 3.7V nominal. The BMS inside the camera body manages charge cutoff and low-voltage protection directly — the cell itself carries no external protection circuit, so physical dimensions and voltage rating must match exactly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, confirming BMS acceptance at full charge termination and low-voltage cutoff behavior consistent with the original cell spec. No false low-battery flags were triggered during the test run.
• First-use charge cycle on the RoadRunner 300: Connect the camera to its OEM USB charger and run one complete charge cycle before mounting it in the vehicle. The RoadRunner 300's battery indicator calibrates its remaining-charge display from the first full charge — skipping this step can cause the indicator to read inaccurately during early use.

RoadRunner 300 battery indicator stuck at full then dropping suddenly to zero

This happens when the camera's charge-level mapping hasn't been calibrated to the new cell's discharge curve. The RoadRunner 300 estimates remaining charge by tracking voltage thresholds — a new cell with a slightly different curve can fool the indicator into staying high until voltage drops off sharply. Run one full charge-to-discharge cycle with the camera recording continuously to let the BMS re-map the thresholds. After that cycle, the indicator should track the cell accurately.

Camera cuts to parking mode recording then shuts off sooner than expected after cell replacement

Parking mode draws a continuous standby current even when the engine is off, which adds load beyond what normal driving-loop recording demands. A 660mAh cell at 3.7V holds 2.44Wh — if the camera's low-voltage cutoff is set aggressively, parking mode can exhaust the cell before the next drive. Check the RoadRunner 300 parking mode timeout setting in the menu and reduce the standby duration if the camera is regularly sitting unpowered for extended periods. Setting the cutoff voltage threshold in the camera's advanced settings to its lowest permitted value will also extend usable capacity before shutdown.