About this replacement
Huawei Honor V20 / View 20 — 3.85V Li-Polymer Replacement Battery (HB426489ECW)
This is a 3900mAh Li-Polymer cell built to replace the original HB426489ECW / HB426489EEW battery in the Huawei Honor V20, View 20, PCT-TL10, and PCT-AL10. It runs at 3.85V nominal and delivers 15.02Wh. If your phone is shutting down unexpectedly, losing charge rapidly, or the original cell has swollen, this cell slots into the same footprint.
- PCT-TL10, PCT-AL10, Honor V20, View 20 compatibility: These model variants share the same battery bay dimensions (85.80 × 63.10 × 3.96mm), the same 3.85V single-cell architecture, and the same BMS connector pinout — which is why one part number covers the full range.
- Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the Honor V20 platform and confirmed the BMS handshake, charge termination at 4.35V, and low-voltage cutoff behaviour matched OEM spec without triggering protection faults.
- Fuel gauge recalibration after swap: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate — this gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins on an uncalibrated coulomb counter.
Sudden shutdown at 20–30% on the Honor V20 after a cell swap
This happens when the fuel gauge IC is still running the discharge curve it learned from the old, degraded cell. The new cell hits a voltage cliff under modem or display load that the IC does not expect at that reported percentage. The phone interprets the voltage drop as empty and cuts power. One full discharge to automatic shutdown, followed by a full charge without interruption, resets the coulomb counter and clears this behaviour.
Huawei fast charge not activating on first cycle after replacement
Huawei's proprietary charging protocol negotiates with the battery BMS on the first connection. A new BMS may not complete that handshake immediately if the cell voltage is below the threshold the charge IC expects at startup. Plug in using the original Huawei charger and cable — third-party cables often lack the correct impedance for protocol negotiation. If fast charge still does not activate after the first full cycle, check that the connector is fully seated, as even slight misalignment breaks the data pin contact at 3.85V nominal.