Lenovo ThinkPad E14 Gen2 Replacement Battery 11.34V 3950mAh

Lenovo ThinkPad E14 Gen 2 / E15 Gen 2 — 11.34V Li-Polymer Replacement Battery (L19L3PD5)

This 11.34V lithium-polymer battery replaces the original cell in the Lenovo ThinkPad E14 Gen 2 and ThinkPad E15 Gen 2 series, including the 20TA000DGE and 20T9S00K00 variants. Capacity is 3950mAh (44.79Wh), matching the OEM specification. It also cross-references SB10X02608, L19C3PD5, L19M3PD5, and several 5B10X part numbers.

• E14 Gen 2 and E15 Gen 2 fitment: Both the 14-inch and 15-inch second-generation ThinkPad E series share the same 11.34V three-cell battery architecture, connector pinout, and BMS communication protocol — which is why one cell covers both chassis sizes.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on a ThinkPad E14 Gen 2 unit. The BMS handshake completed without error, charge termination triggered correctly at full voltage, and the protection circuit responded normally to discharge floor events.
• BIOS learn cycle after installation: After fitting this cell, run one full discharge down to hibernate-cutoff, 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 in Lenovo Vantage or Windows battery report after any cell swap.

Laptop shuts down at 20–30% remaining after battery swap

This happens because the fuel gauge IC still holds calibration data from the old, degraded cell. Under combined CPU and display load, the new cell's actual voltage curve doesn't match the IC's stored model, so the system hits a predicted cutoff voltage before the cell is genuinely depleted. The fix is a full calibration cycle: drain to hibernate-cutoff under normal use, then charge to 100% without interruption. After two or three of these cycles, the fuel gauge re-maps to the new cell and shutdown behaviour normalises above 15V discharge floor.

BIOS reports battery Wh rating as incorrect after replacement

The Wh figure shown in BIOS or Lenovo Vantage is pulled from the cell's EEPROM, not measured live. When a replacement cell's EEPROM-stored value differs slightly from the original OEM figure, the system flags a mismatch or displays a lower-than-expected Wh number. This is a metadata difference between EEPROM-rated capacity and the actual chemistry, not a fault with the cell itself. Confirm the physical voltage reads 11.34V at full charge — if it does, the cell is functioning correctly regardless of what the Wh field displays.