About this replacement
Huawei Nova 6 (WLZ-AL10 / WLZ-AN00) — 3.85V Li-Polymer Replacement Battery (HB446589EEW)
This is a 3900mAh, 3.85V lithium-polymer cell for the Huawei Nova 6 smartphone. It fits the WLZ-AL10 and WLZ-AN00 variants and carries OEM part numbers HB446589EEW and HB446589EEC. Install it when the original cell no longer holds charge or causes unexpected shutdowns.
- Nova 6 WLZ-AL10 and WLZ-AN00 compatibility: Both variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol, so one cell covers both boards without modification.
- Bench tested on actual hardware: We ran this cell through full charge cycles on a Nova 6 board and confirmed the BMS accepted the charge IC handshake, held the 4.40V charge ceiling, and triggered protection cutoff correctly at the low-voltage threshold.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins on an uncalibrated cell.
Sudden shutdown at 20–30% on the Nova 6 after a cell swap
The Nova 6's fuel gauge IC retains the discharge curve of the old, degraded cell after a swap. When the new cell's open-circuit voltage drops into a range the IC was not expecting, it reports a false low-state and triggers a protective shutdown. The modem and display together pull enough current at that state of charge to cause a voltage sag the IC interprets as a dead cell. One full discharge-charge cycle — without fast charging — resets the coulomb counter and clears the mismatch.
USB-PD fast charge not recognised on the first cycle after replacement
Huawei's proprietary fast-charge protocol requires the charge IC and BMS to complete a handshake before high-current delivery is authorised. On a fresh cell the BMS may not respond to the fast-charge negotiation until it has completed one standard charge cycle. Plug into a 5V standard charger, let it charge fully, then reconnect the fast charger. If the phone still refuses the protocol, check that the flex connector is fully seated — a partial connection interrupts the BMS communication line.