【Specifications】Battery type : Li-ion ;Voltage: 11.1V. Capacity:45Wh/4050mAh . Battery life: Up to 500 recharge cycles over the life of the battery. 【Replace Part Number】L17L3P51 L17M3P51 L17M3P52 L17C3P51 01AV445 01AV446 01AV447 01AV448 SB10K97606 SB10K97607 SB10K97608 SB10K97609 5B10W13887 5B10W13888 5B10W13889 5B10W13890 【Compatible Model】Lenovo ThinkPad E480 E485 E495 E580 E585 E490 E590 E595 E14 E15 Series. 【Quality Assurance】100% new from manufacturer, every battery has passed factory testing, grade A cells ensure fast charges and low power consumption, built-in circuit protection ensures both safety and stability. CE / FCC / RoHS Certified for safety. 【Warranty】30 Days Money Back And 12 Months Exchange Guarantee. if you have any issues, questions or concerns.CONTACT US.We are friendly Customer Support Experts. Please contact through "Your Orders" tab in Amazon account ,we promise to resolve the problem within 24 hours.