Replaces OEM # 4X50M08811, 61+, 01AV425, 01AV426, 01AV491, 02DL023, L18M6P71, SB10K97582, SB10K97583, SB10K97661 Fits: LENOVO THINKPAD T470, THINKPAD T480, THINKPAD T570, THINKPAD T580, THINKPAD A475, THINKPAD A485, THINKPAD P51s, THINKPAD P52s, THINKPAD 25 Specs: 10.8V, 44WHR, 4400MAH, 6 CELL Brand New GreenTech replacement battery - 6 Month Replacement Warranty Each product has undergone rigorous testing to ensure the correct voltage, circuit protection, stable current, low self-discharge and CE / FCC / RoHS Certified for safety