About this replacement
Huawei Honor 6 — 3.8V Li-Polymer Replacement Battery (HB4242B4EBW)
This 3.8V, 3000mAh Li-Polymer cell replaces the original HB4242B4EBW battery in the Huawei Honor 6 and its variants, including H60-L02, H60-L04, and Mulan. It fits the stock battery bay without modification and reconnects to the same flex connector as the factory cell. Capacity is rated at 11.4Wh.
- Honor 6 variant coverage: The H60-L02, H60-L04, and Mulan share the same battery bay dimensions and connector pinout — same voltage rail, same BMS handshake protocol. One cell fits all of them without adapter or modification.
- Bench tested on actual hardware: We ran this cell on an Honor 6 unit and confirmed the BMS accepted the handshake on first boot. Charge IC communicated correctly with the replacement cell and reported state-of-charge without prompting a fault code.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — skipping this step is the main cause of erratic percentage readings.
Sudden shutdown at 20–30% on the Honor 6 after a cell swap
The Honor 6's fuel gauge IC stores a discharge curve calibrated to the original cell. After a cell swap, that stored curve no longer matches the new cell's actual voltage-versus-capacity profile. When the modem fires or the screen hits full brightness, current draw spikes and the new cell's voltage drops below the shutdown threshold — even though the reported percentage still shows 20–30%. The fix is one full discharge-charge cycle with fast charging disabled, which forces the coulomb counter to rebuild its curve against the replacement cell.
Phone won't power on after the replacement cell sat in storage
Li-Polymer cells self-discharge during storage, and if the replacement cell drops below 2.5V, the BMS enters lockout to prevent damage. The Honor 6 will show no response to the power button — not even a charging indicator on first plug-in. Connect the phone to a charger and leave it for 20–30 minutes without pressing anything; the charge IC trickle-charges the cell back above the BMS re-initialisation threshold, typically around 2.8–3.0V, after which normal charging resumes.