About this replacement
Lenovo Yoga 7 14ARB7 / 14IAL7 Series — 15.36V Li-Polymer Replacement Battery (L21M4PE3)
This is a 15.36V, 4450mAh (68.35Wh) Li-Polymer battery for the Lenovo Yoga 7 14-inch convertible series. It replaces OEM part L21M4PE3, fitting the 82QF002RIN, 82QE007LYA, 82QE001ETA, 82QE00DRLM, and over 169 additional Yoga 7 14ARB7 and 14IAL7 variants. Cells are matched to the original voltage rail so the BMS handshake completes on first boot.
- Yoga 7 14ARB7 and 14IAL7 platform fit: Both the AMD (ARB7) and Intel (IAL7) Yoga 7 14-inch lines use the same L21M4PE3 cell pack, sharing an identical 15.36V four-cell configuration and connector pinout. The BMS communication protocol is the same across both processor variants, so one cell pack covers the full range without modification.
- Bench tested on actual hardware: We ran this cell on a Yoga 7 14IAL7 unit and confirmed the BMS accepted the pack, reported charge status correctly, and cycled through charge and discharge without triggering protection cutoff. BIOS battery information populated within the first full charge cycle.
- First-cycle calibration after install: After fitting, discharge the laptop to hibernate cutoff under normal use — do not manually force shutdown — then charge uninterrupted to 100%. This single learn cycle resets the BIOS fuel gauge against the new cell and clears the false "poor health" warning that appears after every cell swap on this platform.
BIOS reporting poor battery health immediately after replacement
The Yoga 7 BIOS reads health data stored in the old cell's EEPROM and compares it against the new pack on first boot. Because the new cell has no charge history, the firmware flags it as degraded or unknown — this is a data mismatch, not a fault with the cell. Running one full discharge-to-hibernate followed by a complete uninterrupted charge gives the fuel gauge IC enough data to recalibrate. After that cycle, BIOS health status normalises and Windows battery report reflects accurate figures.
Yoga 7 shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC still holds calibration data from the old, degraded cell. The percentage shown no longer maps accurately to actual cell voltage, so the laptop hits the low-voltage cutoff before the display reaches 0%. The fix is the same calibration cycle — full discharge to hibernate, then charge to 100% without interruption. After two complete cycles, the gauge IC relearns the new cell's voltage curve and the shutdown point drops back to the correct level near 5%.