About this replacement
Mitac Mio Moov 150 — 3.7V Li-ion Replacement Battery (338937010159)
This 3.7V 720mAh Li-ion cell replaces the original battery in the Mitac Mio Moov 150 portable GPS navigator. It fits the internal battery bay directly and restores power to the touchscreen display and GPS receiver. OEM part numbers 338937010159 and 078512FAC both cross to this cell.
- Mio Moov 150 fit: The Moov 150 uses a compact 50 × 35 × 6mm cell with a low-current draw profile — the GPS receiver and display together pull well under 500mA during active navigation. This cell matches that envelope and the connector orientation of the original.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Moov 150 platform. The BMS accepted the cell without error flags, held voltage stable during satellite acquisition, and cut off cleanly at the low-voltage threshold without unexpected shutdowns.
- First power-on after fitting: After installing this cell, take the unit outdoors and power it on with a clear sky view. The GPS performs a cold start after any full power removal — first satellite fix takes 5–10 minutes. Subsequent warm starts drop to under a minute once almanac data is cached.
Satellite lock taking longer after fitting a new battery
Removing the battery clears the GPS receiver's cached almanac and ephemeris data — the timing and position data satellites broadcast. Without that cache, the receiver has to download a full set from scratch, which takes 5–10 minutes outdoors with a clear sky view. This is a cold start, not a fault with the battery or the unit. Once the fix is acquired and the device is powered down normally, subsequent starts pull from the stored almanac and lock in under a minute. If the first fix takes longer than 12 minutes, reposition the device flat on a car dashboard away from tinted glass.
Moov 150 shutting off without any low-battery warning
The Moov 150's fuel gauge reads relative to a calibrated baseline — when a new cell is fitted, that baseline is gone and the indicator is uncalibrated. The device may show two or three bars and then cut off immediately because the low-voltage cutoff threshold is hit before the on-screen indicator catches up. To recalibrate, run a full charge to 4.2V on a charger, then use active navigation until the unit shuts off naturally. After one full cycle the indicator tracks real charge state and the warning appears at the correct level.