About this replacement
Lenovo IdeaPad 320 Series — 7.5V Li-Polymer Replacement Battery (L16L2PB1)
This 7.5V, 3900mAh (29.25Wh) lithium-polymer cell replaces the original battery in Lenovo IdeaPad 320 notebooks. It covers the 320-15IAP, 320-17IKB, 320-17ISK, and over 100 additional IdeaPad 320 variants. Cross-reference OEM part numbers L16L2PB1, L16M2PB1, L16S2PB2, L16C2PB2, L16L2PB2, L16L2PB3, L16M2PB3, L16C2PB1, L16S2PB1, L16M2PB2, L17L2PF1, or L17M2PB7 against your existing cell before ordering.
- IdeaPad 320 series fit: All IdeaPad 320 variants covered here share the same 7.5V two-cell architecture, identical connector pinout, and matching BMS handshake protocol — that is why one cell spans this many model numbers without modification.
- Bench tested on actual hardware: We ran this cell on an IdeaPad 320-15IAP and confirmed the BMS initialised correctly, the BIOS recognised the pack without fault codes, and charge current tapered normally through CC/CV transition to 100%.
- First-cycle calibration on IdeaPad 320: After fitting, discharge the laptop normally until it hibernates at low battery, then charge uninterrupted to 100% without interruption. This forces the IdeaPad 320's BIOS battery learn cycle to reset against the new cell chemistry and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting poor battery health immediately after fitting a new cell
The IdeaPad 320 BIOS stores learned capacity and health data in EEPROM tied to the old cell. When a new pack is fitted, that stale EEPROM data makes the BIOS flag the replacement as degraded — even when the cell is brand new. This is a firmware reading problem, not a battery fault. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%; the BIOS learn cycle rewrites the EEPROM against the new cell's actual characteristics. After two to three full cycles, the health status and capacity reading stabilise.
IdeaPad 320 shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC's stored discharge curve no longer matches the new cell's voltage profile. Under full CPU and display load, the cell voltage drops faster than the uncalibrated gauge expects, and the system interprets it as imminent cutoff. The laptop shuts down even though the percentage shown looks safe. Discharge fully to hibernate cutoff twice in a row without interrupting, charging to 100% each time in between — this gives the fuel gauge IC two complete reference curves to recalibrate against the replacement cell. After calibration, the shutdown threshold should track accurately to below 5%.