About this replacement
Asus N750 Series — 11.1V Li-Polymer Replacement Battery (C32-N750)
This is a 11.1V, 6250mAh Li-Polymer replacement battery for the Asus N750 series notebook. It fits models including the N750JK, N750JV, and N750Y47JV-SL. OEM part references are C32-N750 and 0B200-00400000.
- N750 series compatibility: The N750JK, N750JV, and related variants share the same 11.1V three-cell Li-Polymer pack format, connector pinout, and BMS communication protocol — which is why a single cell services the entire line without modification.
- Bench tested on actual hardware: We cycled this cell through charge and load on the N750 platform. The BMS handshake completed correctly, charge current stepped down at the expected threshold, and the protection circuit tripped at the rated low-voltage cutoff under sustained CPU and GPU load.
- First-cycle calibration on the N750: After fitting this cell, run the laptop unplugged until it reaches hibernate cutoff, then charge uninterrupted to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting battery health as poor immediately after fitting a new cell
The N750's BIOS stores charge history and wear data from the previous cell in a learn register. When a new cell goes in, that register still holds degraded-cell data, so the firmware flags poor health even though the cell is new. This is not a battery fault — it is a calibration mismatch. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% resets the learn cycle. After two or three full cycles, the BIOS health reading will accurately reflect the new cell.
Laptop shuts down abruptly while the OS gauge still shows 20–25% remaining
This happens when the fuel gauge IC's stored charge map no longer matches the new cell's actual discharge curve. Under combined CPU and display load, the cell voltage drops faster than the IC predicts, hitting the hardware cutoff while the OS still shows charge remaining. The fix is cell calibration: drain fully to hibernate, then charge to 100% without pausing. Repeat this two to three times until the OS percentage and the actual cutoff point align — the gauge IC recalculates its map against the new cell's voltage slope each cycle.