About this replacement
Samsung M60 Aura T5450 Chartiz — 11.1V Li-ion Replacement Battery (AA-PB2NC3B)
This 11.1V 4400mAh Li-ion cell replaces the original battery in the Samsung M60 Aura series notebooks, including the T5450 Chartiz, T7500 Calipa, and T7500 Cruza. It matches the original voltage rail and connector pinout, so no adapter or modification is needed. Capacity is 4400mAh (48.84Wh), drawn from the product specification — not estimated.
- M60 Aura series compatibility: The T5450 Chartiz, T7500 Calipa, and T7500 Cruza all share the same battery bay dimensions, 11.1V three-cell voltage rail, and SMBus communication protocol. One cell covers the full range without any hardware modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on M60-series hardware. The BMS handshook correctly over SMBus, charge acceptance reached full capacity, and no protection cutoffs triggered during discharge under combined CPU and display load.
- Post-install calibration on the M60 series: After fitting this cell, run the laptop on battery until it hibernates at 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 poor battery health immediately after installing this cell
The Samsung M60 BIOS reads health data from EEPROM registers stored in the battery's fuel gauge IC. When a new cell arrives, those registers reflect factory defaults — not real charge history on your specific unit. The BIOS compares these defaults against its learned values from the old cell and flags a mismatch as poor health. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learn cycle and clears the warning. After two or three cycles, reported health should read normal.
Laptop shutting down at 20–30% shown on the fuel gauge
This happens when the cell voltage drops below the BMS cutoff threshold under full load before the fuel gauge expects it. On the M60 series, running CPU-intensive tasks alongside full display brightness creates a current draw that causes a rapid voltage cliff in the lower charge range. The fuel gauge IC hasn't yet calibrated its discharge curve against the new cell, so its percentage estimate lags behind the actual voltage drop. Run two full discharge-to-hibernate cycles to let the IC map the new cell's voltage curve — the cutoff point should stabilise above 10% after that.