About this replacement
Lenovo Yoga 7 Slim 14ARE05 — 15.36V Li-Polymer Replacement Battery (L19C4PF4)
This is a 15.36V, 3850mAh (59.14Wh) Li-Polymer battery for the Lenovo Yoga 7 Slim 14ARE05 and Yoga Slim 7 series ultrabooks. It replaces OEM part numbers L19C4PF4, L19M4PF4, SB10W65282, SB10W65284, 5B10W65273, 5B10W65276, and 5B10W65297. The cell fits the 14ARE05, Yoga Slim 7-14ARE, Yoga 14s, and Yoga Slim 7 14ITL05 (82A3003CUE), among others.
- Yoga Slim 7 series compatibility: These models share the same four-cell 15.36V architecture, identical connector pinout, and BMS handshake protocol — which is why one part number covers both the AMD 14ARE05 and Intel 14ITL05 variants.
- Bench tested on actual hardware: We ran this cell on the Yoga Slim 7 14ARE05 platform and confirmed the BMS completed a full charge cycle, communicated state-of-charge data to the firmware, and held the rated voltage across a sustained CPU-plus-display load without triggering a low-voltage cutoff.
- First-cycle calibration on the Yoga Slim 7: After installing, run one full discharge to the hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting poor battery health after swapping the L19C4PF4 cell
When a new cell goes in, the BIOS still holds EEPROM data from the old battery — charge cycles, wear percentage, and last-known capacity. Until the firmware re-learns the new cell's actual discharge curve, it compares current readings against stale data and flags the battery as degraded. This is a firmware calibration issue, not a fault with the replacement cell. Run one complete discharge-to-hibernate then a full uninterrupted charge — after that cycle the BIOS learn routine overwrites the old EEPROM values and the health flag clears.
Yoga Slim 7 shutting down at 20–30% charge remaining
The fuel gauge IC estimates remaining capacity based on voltage curves loaded during calibration. A new cell with different internal resistance than the worn original will cause the gauge to misread voltage sag under full CPU and display load — the laptop sees what looks like a near-empty cell and cuts power before the gauge hits zero. The underlying cause is an uncalibrated fuel gauge IC, not a faulty cell. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100%; the gauge recalibrates against the new cell's actual voltage floor, and the premature shutdowns stop.