About this replacement
Lenovo IdeaPad 330 Series — 7.5V Li-Polymer Replacement Battery (L17M2PF0)
This is a 7.5V, 4600mAh (34.5Wh) lithium-polymer replacement battery for the Lenovo IdeaPad 330 and 330G series laptops. It fits models including the IdeaPad 330-15ARR and replaces OEM part numbers L17M2PF0, L17D2PF1, L17M2PF1, L17M2PF2, and L17L2PF0, among others. The cell slots into the same bay as the original and connects via the same multi-pin BMS connector.
- IdeaPad 330 series compatibility: All IdeaPad 330 and 330G variants covered here share the same 7.5V two-cell Li-Polymer architecture and the same physical connector pinout. The BMS in each model reads cell voltage and temperature across identical rails, so one cell fits the entire group without firmware differences.
- Bench tested on actual hardware: We ran this cell on an IdeaPad 330-15ARR and monitored BMS handshake through full charge and discharge cycles. The BMS accepted the cell without fault flags, and charge termination triggered correctly at 8.4V under the standard CC-CV profile.
- First-cycle calibration on the IdeaPad 330: After installing, run the laptop on battery until it shuts down to hibernate-cutoff — do not plug in early. Then charge uninterrupted to 100% without using the machine. This forces the IdeaPad's fuel gauge IC to re-learn the new cell's actual capacity and clears the inaccurate health warning that appears in Lenovo Vantage after a cell swap.
BIOS reporting poor battery health immediately after fitting a new cell
The IdeaPad 330's BIOS reads battery health from EEPROM data written by the previous cell's BMS over its charge history. When a new cell is fitted, the EEPROM values — cycle count, full charge capacity, and design capacity — do not automatically reset. The BIOS then compares the new cell's reported charge against stale historical data and flags the battery as worn. Running one complete discharge-to-hibernate followed by one uninterrupted charge to 100% rewrites the fuel gauge IC baseline and corrects the health readout in both BIOS and Lenovo Vantage.
IdeaPad 330 shutting down suddenly while the OS still shows 20–30% charge
This happens when the fuel gauge IC's state-of-charge estimate drifts far enough from actual cell voltage that the laptop hits the hardware low-voltage cutoff before the OS registers a low battery warning. Under combined CPU and display load, cell voltage can drop faster than the gauge predicts, hitting the cutoff threshold — typically around 6.0V for a 7.5V two-cell pack — abruptly. The fix is a calibration cycle: discharge fully to automatic hibernate or shutdown, then charge to 100% without interruption. After two to three calibration cycles, the gauge IC tracks actual cell voltage closely enough that OS warnings and real cutoff align.