About this replacement
Lenovo Yoga 2 11 — 7.4V Li-Polymer Replacement Battery (L13M4P21)
This 7.4V 4600mAh (34.04Wh) Li-Polymer cell replaces the original battery in the Lenovo Yoga 2 11 convertible notebook. It fits the 11.6-inch models including the Yoga 2 11-59417913 and Ideapad Yoga 2332. OEM part numbers L13M4P21, L13L4P21, and 121500224 all cross-reference to this cell.
- Yoga 2 11 platform compatibility: These models share the same 7.4V two-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol. The fuel gauge IC communicates directly with the Lenovo BIOS over SMBus — the cell must match the voltage rail exactly or the system will refuse to charge.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Yoga 2 11 unit. The BMS handshake completed without fault codes, and the BIOS recognised the battery without requiring a manual override. Charge current behaved normally across all stages.
- First-cycle reset on Yoga 2 11: After fitting, run one full discharge to the hibernate cutoff point, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting battery health as poor after fitting a new cell
The Yoga 2 11 stores charge history and health data in the EEPROM of the original cell. When a new cell is fitted, the BIOS reads no historical data and flags the battery as unknown or degraded. This is not a fault with the replacement — it is the BIOS responding to a blank EEPROM. Run one full discharge-to-hibernate followed by an uninterrupted full charge. After two to three cycles, the BIOS learn routine recalibrates and the health warning clears.
Yoga 2 11 shutting down at 20–30% charge shown on screen
This happens when the cell cannot sustain voltage under the combined load of the CPU and display — the voltage drops below the BMS cutoff threshold before the fuel gauge reads zero. On the Yoga 2 11, the fuel gauge IC calibration drifts after the original cell is replaced because the new cell's discharge curve does not match the stored reference. The fix is to let the laptop run to a hard hibernate twice in a row, then charge fully each time without interruption. After those calibration cycles, the OS gauge tracks the actual cell voltage accurately and shutdowns at low percentage stop.