ASUS A32-U46 14.8V Laptop Replacement Battery 4400mAh

Asus U46 Series — 14.8V Li-ion Replacement Battery (A32-U46)

This is a 14.8V, 4400mAh (65.12Wh) Li-ion replacement battery for the Asus U46 notebook series. It fits U46, U46E-1AWX, U46E-BAL5, U46E-BAL6, and over 36 additional U46 variants using OEM part numbers A32-U46, A41-U46, A42-U46, 4INR18/65, and 4INR18/65-2. If your original cell no longer holds a charge or the laptop won't run off battery power, this is the direct replacement cell for that platform.

• U46 series cell compatibility: The U46 platform uses a shared battery bay and connector across its E-suffix variants. All supported models run the same 14.8V four-cell configuration, so the BMS handshake and physical connector are consistent across the lineup listed above.
• Bench tested on actual hardware: We ran this cell through charge-to-full, load discharge, and BMS cutoff on U46 hardware. The protection circuit engaged correctly at low-voltage cutoff, and the charge IC accepted the cell without fault codes on the first cycle.
• First-cycle calibration on the U46: After fitting this cell, run a full discharge to hibernate-cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning the U46 BIOS displays after every cell swap.

Why the U46 BIOS flags a new battery as poor health immediately after swap

The U46 BIOS reads health data from EEPROM registers carried over from the old cell. When a new cell is installed, those registers still reflect the degraded state of the previous battery. The system hasn't yet run a learn cycle against the new cell's actual charge curve, so it reports the stale data as current health. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the firmware to overwrite those registers with accurate values from the new cell.

U46 shutting down at 20–30% battery shown on screen

This happens when the fuel gauge IC hasn't been calibrated to the new cell's voltage curve. The gauge assumes the old cell's steeper voltage drop and calls shutdown early, even though capacity remains. It is not a fault with the replacement cell. Run two to three full discharge and charge cycles — by the third cycle the gauge IC recalibrates, and the displayed percentage will track actual remaining voltage accurately down to the cutoff point near 10.8V.