About this replacement
Lenovo ThinkPad T490s / T495s Series — 11.52V Li-Polymer Replacement Battery (02DL013)
This 11.52V, 4850mAh (55.87Wh) Li-Polymer battery replaces the original cell in the Lenovo ThinkPad T490s and T495s ultrabook series. It fits models including the T490s (20NX0015CD), T490s-20NYS02A00, and T495s-20QKS01E00. Cross-references cover OEM part numbers 02DL013, 02DL014, L18C3PD2, L18L3PD1, L18M3PD1, and SB10K97651, among others.
- T490s and T495s shared battery platform: Both the T490s and T495s use the same 11.52V three-cell Li-Polymer pack with an identical connector pinout and BMS communication protocol. Lenovo sourced this cell under multiple part numbers across production runs — 02DL013 through 02DL015, L18M3PD1, L18M3PD2, and the SB10K series — all electrically equivalent to this replacement.
- Bench tested on actual hardware: We ran this cell on a T490s under continuous CPU and display load. The BMS handshake completed without fault codes, charge acceptance reached full capacity, and the fuel gauge IC registered correct Wh data within two cycles.
- Post-install discharge cycle on ThinkPad: After fitting this battery, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in Lenovo Vantage after a cell swap.
BIOS reporting battery health as poor after replacement
The ThinkPad BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported values. When those numbers don't match, Lenovo Vantage flags the battery as degraded or unknown — even on a fresh cell. 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 the learn cycle data against the new cell and clears the warning.
Laptop shutting down at 20–30% remaining after battery swap
This happens when the fuel gauge IC hasn't yet mapped the new cell's voltage-to-capacity curve. The T490s shuts down when pack voltage drops below the safety floor — but the gauge is misreading that floor as 20–30% instead of 0%. The fix is two or three full discharge-charge cycles so the IC recalibrates its curve. After calibration, the gauge tracks accurately and the premature shutdowns stop.