About this replacement
Asus N82 Series — 10.8V Li-ion Replacement Battery (A32-N82)
This is a 10.8V, 4400mAh (47.52Wh) Li-ion battery for the Asus N82 notebook line. It fits the N82, N82E, N82EI, and N82J among other N82 variants. It replaces OEM part numbers A32-N82, A42-N82, and 07G016G81875.
- N82 series compatibility: All N82 variants share the same 10.8V battery rail, connector pinout, and BMS handshake protocol. Swapping between N82 sub-models carries no electrical risk — the cell slots in and communicates with the EC chip the same way across the range.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on N82 hardware. The BMS responded correctly at both low-voltage cutoff and full-charge termination, with no false protection trips during normal load.
- First-use calibration on the N82: After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after a cell swap.
Why the N82 BIOS reports poor battery health after a cell swap
The N82 EC chip reads charge history and wear data stored in the old cell's EEPROM. When a new cell goes in, that data is blank or mismatched, so the BIOS flags it as degraded before it has any real data to work with. This is not a fault with the replacement cell. Running the full discharge-to-cutoff then uninterrupted charge cycle gives the EC enough data to recalibrate and clear the warning. After two to three full cycles, health reporting normalises.
N82 shutting down at 20–30% battery remaining
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS reads the old curve and calls empty too early, triggering a shutdown while usable charge remains. It is not a cell defect — it is a calibration lag. Run two complete discharge and charge cycles without interruption, and the fuel gauge IC will map the new cell's voltage profile accurately. After calibration, the 20–30% cutoff disappears and the gauge tracks correctly down to the true low-voltage threshold near 9.9V.