About this replacement
Clevo W515LU / W510LU Series — 11.1V Li-ion Replacement Battery (W510BAT-3)
This 11.1V, 2200mAh (24.42Wh) Li-ion battery replaces the W510BAT-3 cell in Clevo W515LU, W510LU, W515PU, and W510S notebooks. It fits the same connector and voltage rail as the original, so installation is straightforward — no adapters, no firmware patches required. Capacity figures come from product data, not estimated or rounded.
- W510/W515 platform fit: The W510LU, W515LU, W515PU, and W510S share the same battery bay dimensions, connector pinout, and 11.1V rail. The BMS in each model communicates over the same SMBus protocol, so the battery's EEPROM data handshakes correctly without triggering a permanent "unknown battery" flag.
- Bench tested on actual hardware: We cycled this cell on a W515LU unit through charge, discharge, and a simulated CPU-plus-display load spike. The BMS held cutoff voltage at the correct threshold and the BIOS recognised the cell as a valid source within one full charge cycle.
- Post-swap calibration on W515LU: After fitting this battery, run one full discharge to the hibernate cutoff, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on the first boot after any cell swap on this platform.
BIOS reporting poor battery health immediately after fitting a new cell
The W515LU BIOS stores learned capacity data from the previous cell in its battery learn table. When a new cell arrives, the BIOS compares live readings against stale reference data and flags the health as poor or unknown — even when the new cell is fully functional. This is a calibration state, not a fault. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite its reference table against the new cell's actual chemistry. After two to three cycles, the health indicator normalises.
Laptop shuts down hard 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 actual voltage profile. Under full CPU and display load, the cell voltage drops faster than the stale curve predicts, hitting the BMS low-voltage cutoff before the OS gauge reaches 0%. The gauge shows 20–30% because it is reading a curve calibrated to a degraded old cell. Discharge the battery fully to hibernate cutoff, charge to 100%, and repeat for three cycles — the fuel gauge IC recalibrates against the new cell and the shutdowns stop. Target cell voltage at rest after full charge should read 12.5–12.6V at the connector.