Lenovo ThinkPad 11e Yoga Gen 6 L19C4PG1 Replacement Battery 15.36V 2900mAh

Lenovo 11e Yoga Gen 6 — 15.36V Li-Polymer Replacement Battery (L19C4PG1)

This 15.36V, 2900mAh (44.54Wh) Li-Polymer battery replaces the original cell in the Lenovo ThinkPad 11e Yoga Gen 6 convertible 2-in-1 notebook. It fits variants including 20SES00100, 20SES0FH00, 20SES0BU00, and 20SES0LT00, among others. Cross-reference OEM part numbers L19C4PG1, L19M4PG1, SB10T83124, SB10T83125, or 5B10W13881 before ordering.

• 11e Yoga Gen 6 multi-variant fit: Lenovo built all Gen 6 variants around the same 15.36V four-cell battery rail with a shared BMS connector and identical charge-control handshake. That common architecture means one replacement cell covers the full 20SES model range without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Gen 6 unit. The BMS accepted the new cell immediately, the fuel gauge initialised without error, and charge terminated cleanly at 100% with no false cutoff events.
• Post-install calibration on the ThinkPad 11e Yoga: After fitting, run the laptop on battery until it hibernates at low charge, 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.

BIOS reporting poor battery health immediately after fitting a new cell

The ThinkPad BIOS reads health data stored in the old cell's EEPROM and carries that data forward when a new cell is installed. The firmware does not automatically re-learn the new cell's characteristics until a deliberate calibration cycle is completed. Until then, the health indicator reflects the degraded old cell, not the actual state of the replacement. Run one full discharge to hibernate cutoff followed by an uninterrupted charge to 100% — this resets the learn cycle and the health warning clears on the next boot.

Laptop shutting down at 20–30% shown on the fuel gauge

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge was mapped to the old cell's degraded discharge profile, so it misreads remaining capacity and triggers a low-battery shutdown too early. The cell itself is not faulty — it still holds charge, but the system's voltage reference points are misaligned. Run two to three full discharge-and-charge cycles; the gauge IC recalibrates incrementally and the shutdowns stop once the readings track correctly to around 3.0V per cell at the low end.