【Specifications】Battery type : Li-ion ;Voltage: 14.6V. Capacity:41Wh 2670mAh . Battery life: Up to 500 recharge cycles over the life of the battery. 【Replace Part Number】83 01AV418 SB10K97575 01AV417 SB10K97574 4X50M33574 82 01AV414 SB10K97571 01AV415 SB10K97572 01AV416 SB10K97573 4X50M33573. 【Compatible Model】For Lenovo ThinkPad E570 E570C E575 Series(Important Note: there are two types of the 83 battery buckle (big and small), please choose the right type according to your laptop's original battery). 【Quality Assurance】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.