HB476586ECW Huawei Honor X10 Replacement Battery 3.85V 4200mAh

Huawei Honor X10 / X10 5G — 3.85V Li-Polymer Replacement Battery (HB476586ECW)

This 3.85V, 4200mAh lithium-polymer cell is a direct swap for the original HB476586ECW battery in the Huawei Honor X10 and Honor X10 5G. It fits the TEL-AN00 and TEL-TN00 board variants. Dimensions are 84.00 × 63.50 × 4.50mm — verify this against your original cell before installing.

• Honor X10 and X10 5G coverage: Both the standard and 5G variants of the Honor X10 share the same battery bay dimensions, connector pinout, and BMS handshake protocol, so one cell covers both TEL-AN00 and TEL-TN00 board builds without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Honor X10 platform. The BMS accepted the cell without error flags, and the fuel gauge IC tracked state-of-charge without anomalies across the full voltage range from 4.40V to 3.00V.
• First cycle fast-charge protocol: After installation, disable fast charging in the phone's battery settings and complete one full discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before Huawei's proprietary fast-charge protocol pushes elevated current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Honor X10 after a cell replacement

The Honor X10 fuel gauge IC holds a discharge curve learned from the old, degraded cell. When a fresh 4200mAh cell is installed, the IC's stored curve no longer matches actual cell voltage behaviour. At around 20–30% reported charge, the new cell's open-circuit voltage drops through a steeper cliff than the IC expects under modem and display load. The phone interprets this as a critical low-voltage event and shuts down. One complete discharge-charge cycle at standard current — without fast charging — forces the coulomb counter to re-learn the new curve and eliminates these premature shutdowns.

Huawei fast charging not activating on first cycle after battery swap

Huawei's proprietary fast-charge protocol performs a handshake between the charge IC and the battery BMS before elevating current. On the first charge after a cell swap, the new BMS has not yet completed this negotiation sequence, so the charge IC defaults to standard 5V/1A input. This is not a fault with the cell or the charger. Charge the phone once at standard current until full, then disconnect and reconnect the original Huawei fast-charge adapter — the handshake completes on the second cycle and fast charging activates normally.