About this replacement
Lenovo Yoga Slim 9 14ITL5 — 7.72V Li-Polymer Replacement Battery (L19C4PH0)
This 7.72V, 8150mAh Li-Polymer cell replaces the original battery in the Lenovo Yoga Slim 9 14ITL5 ultrabook. It covers a wide range of 14ITL5 regional variants, including the 82D1002VIV, 82D1003CRU, 82D1003WVN, and 82D1004DLM, among others. OEM part numbers L19C4PH0, L19M4PH0, and SB10Y75087 all cross-reference to this cell.
- Yoga Slim 9 14ITL5 variant coverage: All 14ITL5 variants share the same battery bay dimensions, voltage rail, and BMS connector pinout. The physical cell measures 291.40 × 108.80 × 4.60mm — the slim 4.6mm profile is specific to this chassis and must be matched exactly.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 14ITL5 unit. The BMS handshake completed cleanly, charge current ramped correctly through CC and CV phases, and the protection circuit tripped at the expected voltage floor under load.
- Post-install calibration on the Yoga Slim 9: After fitting, run the laptop down to hibernate cutoff without interruption, 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 battery health as poor after replacing the L19C4PH0
When a new cell goes in, the BIOS still holds EEPROM data from the old battery. The fuel gauge IC has no cycle history for the new cell, so the health calculation is built on stale reference points. Until the learn cycle runs, the system reports artificially low health or flags a warning in Lenovo Vantage. One full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the fuel gauge IC the data it needs to recalibrate.
Yoga Slim 9 shutting down at 20–30% remaining after battery swap
This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load before the fuel gauge expects it. The gauge, still running on old EEPROM calibration data, reads 20–30% but the actual cell voltage has already hit the floor. It is not a fault with the replacement cell — it is a calibration gap. Run two full discharge-to-hibernate cycles with the display at full brightness and a moderate CPU load, then charge to 100% each time. After two cycles, the fuel gauge IC maps the new cell's voltage curve accurately and the early shutdowns stop.