About this replacement
Lenovo IdeaPad 3 15ITL6 / V15 G3 ABA — 11.4V Li-Polymer Replacement Battery (L20C3PF0)
This is an 11.4V, 3950mAh (45.03Wh) Li-Polymer replacement battery for the Lenovo IdeaPad 3 and V15 G3 series notebooks. It fits the IdeaPad 3 15ITL6, IdeaPad 3 15IAU7, V15 G3 ABA, and over 167 additional variants that share the same connector and BMS handshake protocol. OEM part numbers covered include L20C3PF0, L20L3PF0, L20M3PF0, SSB11B36277, and 5B11B36275.
- IdeaPad 3 and V15 G3 platform compatibility: These models share a unified 11.4V three-cell Li-Polymer architecture with an identical battery connector and EEPROM-based BMS handshake. The firmware on each chassis reads the same authentication and charge-management registers, so one cell works across the full family.
- Bench tested on actual hardware: We ran this cell on an IdeaPad 3 15ITL6 unit. The BMS completed full charge authentication, the BIOS detected the pack without error codes, and the fuel gauge IC locked onto the new cell data within two calibration cycles.
- Post-swap calibration on the IdeaPad 3: After installing this cell, run one full discharge down to hibernate-cutoff, 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 battery health as poor immediately after replacement
The IdeaPad 3 BIOS reads health data from the EEPROM on the battery pack, not from live cell voltage. When a new cell is installed, the EEPROM contains factory-default values that don't yet match the BIOS's expected calibration data for a charged cycle. The system flags this mismatch as degraded health. One full discharge-to-hibernate followed by a complete uninterrupted charge allows the fuel gauge IC to rewrite the EEPROM registers with accurate cycle data — after which the BIOS health warning clears.
Laptop shuts down abruptly at 20–30% charge shown on screen
This is a voltage cliff failure — under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track, hitting the BMS low-voltage cutoff before the OS gauge reaches 0%. The BIOS learn cycle hasn't yet mapped the new cell's discharge curve to actual load conditions. Run two full calibration cycles: discharge under normal workload to hibernate-cutoff, then charge to 100% each time. After both cycles, the fuel gauge IC recalibrates its load-compensation model and the shutdown threshold aligns correctly to the displayed percentage.