About this replacement
Lenovo IdeaPad Y330 Series — 11.1V Li-ion Replacement Battery (LO8S6D11)
This 11.1V, 4400mAh (48.84Wh) lithium-ion cell replaces the original battery in Lenovo IdeaPad Y330 laptops, including the Y330-20002, Y330-2269, and Y330A variants. It fits the OEM connector and BMS communication protocol on these models without modification. Cross-references OEM part numbers LO8S6D11 and L08L6D11.
- IdeaPad Y330 platform compatibility: These Y330 variants share the same 11.1V three-cell configuration, connector pinout, and BMS handshake protocol — so one cell works across the full series without re-pinning or firmware changes.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on Y330 hardware. The BMS accepted the new cell immediately, balanced all three cell groups, and held voltage stable across full CPU and display load.
- First-cycle calibration after install: After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false "poor health" warning that appears after most cell swaps on this platform.
BIOS reporting battery health as poor immediately after replacement
The Y330 BIOS reads health data from EEPROM registers on the battery controller, not from real-time voltage. When a new cell goes in, those registers still carry the degraded history of the old pack. The BIOS flags the new cell as worn before it has run a single cycle. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the firmware to rewrite the learn cycle data against the actual new cell chemistry. After that cycle, the health indicator corrects itself without any BIOS intervention.
Laptop shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC's stored discharge curve no longer matches the actual cell. The gauge reports 25% remaining, but the real cell voltage has already hit the BMS low-voltage cutoff under combined CPU and display load. The Y330 draws hard during full-screen video or sustained CPU tasks — enough to trigger an abrupt shutdown even when the status bar shows charge remaining. Run two full calibration cycles — discharge to hibernate, charge to 100% — to align the fuel gauge IC with the new cell's actual voltage curve.