About this replacement
Huawei Ascend Mate — 3.8V Li-Polymer Replacement Battery (HB496791EBC)
This is a 3.8V, 3900mAh Li-Polymer replacement battery for the Huawei Ascend Mate series. It fits the MT1-U0, MT1-U06, and Ascend Mate 2, among other variants in the same platform family. Capacity is 14.82Wh — matched to the original cell specification.
- Ascend Mate platform compatibility: The MT1-U0 and MT1-U06 share the same battery bay dimensions, connector pinout, and BMS handshake protocol as the wider Ascend Mate lineup. One cell fits both because Huawei standardised the power rail across this screen-size tier.
- Bench tested on actual hardware: We cycled this cell on the Ascend Mate platform and confirmed the BMS accepted charge negotiation without fault codes. The protection circuit held cutoff correctly at the low-voltage threshold and did not trip during screen-on load.
- Fuel gauge recalibration on first use: Disable fast charging for the first full discharge-charge cycle after fitting this cell. The fuel gauge IC on the Ascend Mate is calibrated to the old cell's discharge curve — letting it complete one uninterrupted cycle at standard current gives it a clean baseline before high-current charging begins.
Why the Ascend Mate reports wrong battery percentage after a cell swap
The Ascend Mate uses a coulomb counter in the fuel gauge IC to track charge state. When you swap the physical cell, the IC still holds the learned discharge curve from the old battery. The new cell has a different impedance profile, so the percentage shown on screen drifts from actual charge state. One complete discharge to automatic shutdown followed by a full charge resets the coulomb counter and re-anchors the gauge to the new cell's curve.
Sudden shutdown at 20–30% on the replacement cell
This happens when the fuel gauge IC has not yet mapped the new cell's voltage cliff — the point where cell voltage drops sharply under modem or display load. The phone's reported percentage still shows 20–30%, but actual cell voltage sags below the hardware protection threshold the moment a high-draw process fires. Run one full calibration cycle first — discharge until the phone shuts itself off, then charge uninterrupted to 100%. After that cycle, the gauge maps the cliff correctly and shutdowns stop.