Mio MiVue 308 Replacement Battery 3.7V 450mAh 582535

Mio MiVue 308 / 328 / 358 / 388 — 3.7V Li-Polymer Replacement Battery (582535)

This 3.7V, 450mAh lithium-polymer cell replaces the internal battery in the Mio MiVue 308, 328, 358, and 388 dash cameras. It matches OEM part numbers 582535 and 1ICP6/26/36. Install this when the original cell no longer holds charge between drives or prevents parking mode from functioning.

• MiVue 308–388 platform fit: These four models share the same compact housing, internal connector layout, and BMS handshake protocol. The 35.60 × 24.60 × 5.80mm cell dimensions are common across the series — the same physical space and voltage rail run throughout.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the MiVue platform. The BMS accepted the cell without fault flags, voltage held steady at 3.7V nominal, and the protection circuit tripped correctly at low-voltage threshold without requiring a manual reset.
• Parking mode calibration after install: After fitting a new cell, complete one full drive cycle before relying on parking mode. The dashcam's capacitor management system calibrates against the new cell during that first charge run — parking mode duration estimates won't be accurate until that cycle completes.

Footage corrupt or missing after a parking mode session

When the internal battery sags below the write-voltage threshold mid-recording, the MiVue 308 can cut power before the current video file closes cleanly. The result is a corrupt or zero-byte file. A degraded cell drops voltage faster under the sustained draw of parking mode recording, making this more common as the battery ages. Replacing the cell restores the voltage floor the camera needs to complete each write cycle.

Internal battery hot after parking mode in a closed vehicle

Parking mode keeps the camera recording continuously inside an enclosed housing with no airflow. The 450mAh cell sustains that load in a space where cabin temperatures can exceed 60°C in direct sun. Heat accelerates lithium-polymer self-discharge and can trigger the BMS thermal cutoff, ending the parking mode session early. If the housing feels hot to the touch after retrieval, check that the hardwire kit voltage cutoff is set correctly — most kits default to 11.6V to protect the vehicle battery.