Neo A3152 Laptop Replacement Battery 11.1V 4400mAh Li-ion

Neo A3152 / A3150 / 2252 / 4100 — 11.1V Li-ion Replacement Battery

This is an 11.1V, 4400mAh (48.84Wh) lithium-ion battery for the Acer Aspire A3152, A3150, 2252, and 4100 notebook series. It replaces a degraded or failed original cell and restores untethered use. Voltage and form factor match the OEM specification — the battery seats and connects the same way as the original.

• A3152 / A3150 / 2252 / 4100 platform fit: These models share the same battery bay dimensions, connector pinout, and BMS communication protocol, which is why one cell covers the full group. The 11.1V three-cell configuration matches the voltage rail these boards expect.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on an A3152 unit. The BMS handshake completed without error codes, charge acceptance was normal across the full range, and the protection circuit triggered correctly at the low-voltage cutoff threshold.
• First-cycle calibration on Acer notebooks: After fitting this battery, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. 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 after fitting a new cell

Acer notebooks store battery health data in the BIOS using EEPROM values written by the original cell over its lifetime. When a new cell goes in, the BIOS compares the fresh cell's reported data against its stored degradation baseline and flags a mismatch as poor health. This is a firmware calibration issue, not a fault with the replacement. One complete discharge-to-hibernate followed by an uninterrupted charge to 100% allows the BIOS learn cycle to rewrite the baseline against the new cell and clear the warning.

Laptop shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC still holds calibration data from the old, degraded cell. Under full CPU and display load, actual cell voltage drops faster than the outdated fuel gauge model predicts, and the battery hits the hardware low-voltage cutoff while the OS still shows 20–30% remaining. The fix is a calibration cycle: let the laptop run down to forced hibernate, then charge to 100% without interruption. After two to three of these cycles, the fuel gauge IC recalibrates to the new cell's actual discharge curve and the percentage readout becomes accurate.