About this replacement
Lenovo IdeaPad V310-14ISK — 14.4V Li-ion Replacement Battery (L15L4A02)
This 14.4V Li-ion battery replaces the original L15L4A02 cell in the Lenovo IdeaPad V310-14ISK 14-inch notebook. Capacity is 2200mAh (31.68Wh), matching the stock specification. It fits the 80SX series variants and the broader V310-14ISK platform covered by cross-reference part numbers L15C4A02, L15S4A02, and related OEM codes.
- V310-14ISK platform compatibility: The 80SX chassis uses a consistent 14.4V four-cell architecture across its sub-variants. The connector pinout, BMS handshake voltage, and physical locking tab are identical across 80SX002KUS, 80SX000VHH, and 80SX000UHH, which is why a single cell covers all three.
- Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on a V310-14ISK unit. The BMS negotiated correctly with the EC firmware, charge current stepped down normally at the top-of-charge threshold, and no protection trip was triggered during load.
- Post-install calibration on the V310-14ISK: After fitting this cell, discharge the laptop fully until it hibernates, then charge uninterrupted to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting poor battery health immediately after fitting a new V310-14ISK cell
The V310-14ISK EC reads battery health from EEPROM data stored by the previous cell. When a new cell is installed, the EC compares its learned discharge curve against the old EEPROM baseline and flags a mismatch as degraded health. This is not a fault with the replacement cell. Running one complete discharge-to-hibernate followed by an uninterrupted full charge resets the learn cycle and updates the EEPROM reference to the new cell. After two to three cycles, the health reading stabilises.
Laptop shutting down at 20–30% charge shown on the V310-14ISK gauge
This happens when the fuel gauge IC's stored discharge curve no longer matches the actual cell voltage behaviour under load. Under combined CPU and display draw, the cell voltage drops faster than the outdated curve predicts, hitting the EC's low-voltage cutoff before the gauge reaches 0%. The fuel gauge IC needs calibration cycles against the new cell to map the correct voltage cliff. Run two full discharge-to-hibernate and full-charge cycles, and the shutdowns at false percentages will stop. After calibration, the EC cutoff triggers correctly at approximately 10.8V under load.