ASmobile AS62FM945GM1 Replacement Battery 11.1V 4400mAh Li-ion

ASmobile AS62FM945GM1 Series — 11.1V Li-ion Replacement Battery

This is an 11.1V 4400mAh (48.84Wh) lithium-ion battery for ASmobile notebook computers. It fits the AS62FM945GM1, AS62FP945GM1, AS62J945PM1, AS62JM945PM1, and at least nine additional models in the same series. If your original cell has degraded or stopped holding charge, this replaces it directly.

• AS62 series compatibility: These models share a common 11.1V three-cell configuration with the same connector pinout and BMS communication protocol. That's why one cell fits across the full AS62 lineup without hardware modification.
• Bench tested on actual hardware: We ran this cell through charge, discharge, and BMS handshake verification. The protection circuit responded correctly to over-voltage and over-current events, and the cell held within 2% of rated capacity at full charge.
• Post-install discharge cycle: After fitting this battery, run the laptop on battery only until it hibernates, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.

Why the AS62 BIOS reports poor battery health after a cell swap

The BIOS on these ASmobile notebooks stores learned capacity data from the previous cell in non-volatile memory. When a new cell arrives with a different charge history, the BIOS compares it against stale figures and flags the health as poor or unknown. This is not a fault with the replacement cell — it's an EEPROM mismatch. One complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle and resolves the warning.

Laptop shuts down at 20–30% battery shown on screen

This happens when the fuel gauge IC hasn't been calibrated against the new cell's actual discharge curve. The gauge was trained on the old cell's voltage-to-capacity profile, so it misjudges where the voltage cliff is. Under combined CPU and display load, the cell hits the BMS cutoff voltage before the OS expects it. Run two full discharge-to-hibernate and full-charge cycles — by the third cycle the fuel gauge tracks the real cutoff at or below 10%.