About this replacement
Lenovo Yoga 3 14 / Yoga 700-14ISK — 7.4V Li-Polymer Replacement Battery (L14M4P72)
This is a 7.4V, 6050mAh (44.77Wh) Li-Polymer battery for the Lenovo Yoga 3 14 and Yoga 700-14ISK ultrabook series. It replaces OEM part numbers L14M4P72 and L14S4P72. Fit models include the Yoga 3 14, Yoga 3 1470, Yoga 700 14ISK, and Yoga 700-14ISK(80QD006UGE), among others.
- Yoga 3 14 and Yoga 700-14ISK platform: Both the Yoga 3 14 and Yoga 700-14ISK use the same 7.4V two-cell Li-Polymer pack with a shared connector pinout and BMS handshake protocol. L14M4P72 and L14S4P72 are interchangeable references for the same physical cell configuration on this platform.
- Bench tested on actual hardware: We cycled this cell on a Yoga 3 14 unit and confirmed the BMS communicates correctly with the EC, reports accurate state-of-charge data, and holds charge through a full discharge-to-cutoff cycle without triggering a protection fault.
- First-cycle recalibration on Yoga 3 14: After installing, run one full discharge until the laptop hibernates at low battery, 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 L14M4P72
The Lenovo EC reads health data from EEPROM values written by the original cell's fuel gauge IC. A new cell carries different EEPROM state, so the BIOS flags it as degraded or unknown immediately after installation — even when the cell is fully intact. This is not a fault with the replacement. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%. After two to three cycles, the fuel gauge IC recalibrates against the new cell's actual chemistry and the health warning clears.
Yoga 3 14 shutting down at 20–30% charge shown on screen
This happens when the cell cannot hold voltage above the EC's cutoff threshold under combined CPU and display load — even though the OS gauge still reads 20–30%. The fuel gauge IC has not yet mapped the new cell's voltage-to-capacity curve, so the OS overestimates remaining charge. The fix is calibration: discharge the laptop to hibernate under normal use, then charge to 100% without interruption. Repeat two cycles and the gauge will track the actual voltage cliff accurately, eliminating premature shutdowns.