Asus VivoBook 14 E410MA 11.55V Replacement Battery C31N1912

Asus VivoBook 14 E410MA / E510MA Series — 11.55V Li-Polymer Replacement Battery (C31N1912)

This is an 11.55V, 3400mAh (39.27Wh) lithium-polymer battery for the Asus VivoBook 14 and VivoBook 15 E410MA and E510MA series laptops. It replaces OEM part numbers C31N1912 and 0B200-03680300. The physical dimensions are 190.40 × 98.00 × 5.50mm — confirm these against your original cell before ordering.

• E410MA and E510MA platform fit: Both the 14-inch E410MA and 15-inch E510MA share the same three-cell Li-Polymer pack configuration, identical connector pinout, and matching BMS handshake protocol — which is why one part number covers both chassis.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on E410MA hardware. The BMS communicated correctly with the EC, reported accurate state-of-charge, and triggered low-voltage cutoff at the expected threshold without requiring any firmware override.
• Post-install calibration on the E410MA: After fitting this cell, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears routinely after any cell swap on this platform.

Why the E410MA BIOS reports poor battery health immediately after a cell swap

The E410MA stores battery health data in EEPROM on the original cell. When you swap the cell, the EC reads stale or mismatched EEPROM data from the new battery and flags it as degraded. This is not a fault with the replacement cell — it is a data mismatch. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the EC enough data to rewrite its internal health estimate. After one or two cycles, the health warning clears.

Laptop shuts down at 20–30% remaining after battery swap

This happens because the fuel gauge IC is still calibrated against the old cell's voltage curve. Under full CPU and display load, the new cell hits a voltage cliff earlier than the IC predicts, and the system interprets that voltage drop as empty. The fix is calibration: discharge the laptop under normal use until it shuts itself down, then charge to 100% without interruption. Repeat this two to three times until the OS gauge tracks accurately — the fuel gauge IC needs real discharge data from the new cell to recalibrate its end-point voltage, which sits around 9.0V on this chemistry.