Milink 7" GPS Navigator Compatible Battery 3.7V 1400mAh

Milink GPS-K146 7" AV Player & Navigation — 3.7V Li-Polymer Replacement Battery

This 3.7V, 1400mAh lithium-polymer cell replaces the original battery in the Milink GPS-K146 and the wider 7" AV player & navigation platform. It restores power to both the GPS receiver and the media playback functions when the factory cell can no longer hold a usable charge. Dimensions are 63.00 × 42.00 × 4.60mm — measure your existing cell before fitting.

• GPS-K146 platform fit: The GPS-K146 shares its battery bay and connector pinout with the broader Milink 7" AV navigation series. The cell voltage rail at 3.7V nominal matches the device's power management IC, so the BMS handshake completes without a calibration flag.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the navigation platform, confirming the BMS accepted the cell at first connection and that the charge controller reached cutoff at 4.2V without thermal event.
• First satellite fix after fitting: After fitting this cell, power the unit fully on outdoors and let it acquire a satellite fix before use. GPS performs a cold start after any full power interruption — first fix can take 5–10 minutes. Subsequent warm starts drop under a minute once ephemeris data is cached.

GPS-K146 shutting off without warning during active navigation

When the original battery ages, its actual capacity falls well below the rated 1400mAh, but the on-screen indicator stays miscalibrated against the old cell's discharge curve. The device reads the voltage and reports 20–30% remaining right up until the cell hits the low-voltage cutoff threshold. Fitting a new cell resets the discharge baseline, but the indicator will not recalibrate until the unit completes at least one full charge-discharge cycle. Run the device from 100% down to auto-shutoff once to let the power management IC re-anchor its voltage-to-percentage mapping.

Saved routes and POIs missing after battery swap

Some navigation data on the GPS-K146 is held in battery-backed volatile RAM rather than written to flash on every update. A full power removal — which happens during a battery swap — wipes whatever was buffered but not yet committed to storage. Favourites and recent destinations stored in flash survive the swap; actively recorded routes or unsaved POIs do not. Before swapping the cell, export any critical routes to the device's SD card slot so they can be reloaded after power-on.