SpecificationVoltage: 11.4V. Capacity: 44Wh 3900mAh. Battery Type: Li-ion. Condition:100% New from Manufacturer. Condition: Brand new, from high quality materials, top circuit boards and smart chip. Compatible Part Number45N1740 45N1741 45N1742 45N1743 SB10K12721 00NY639. Compatible Laptop ModelsFit for Lenovo ThinkPad P50s(20FLA005CD), ThinkPad T550(20CJ-J001SAU), ThinkPad T550(20CK-K0029AU), ThinkPad T550(20CJ-J0009AU), ThinkPad T550(20CJ-J001VAU), ThinkPad T550(20CK-K002CAU), ThinkPad T550(20CJ-J000HAU), ThinkPad T550(20CJ-JA002AU), ThinkPad T550(20CJ-J000XAU), ThinkPad T550(20CK-K002FAU), ThinkPad T550(20CJ-JA00EAU), ThinkPad T550(20CK-K002JAU), ThinkPad T550(20CJ-J0011AU), ThinkPad T550(20CJ-JA00VAU), ThinkPad T550(20CJ-J001CAU), ThinkPad T550(20CK-K002MAU), T560-0CCD, ThinkPad T550(20CJ-J0019AU), ThinkPad T550(20CJ-JA01HAU), ThinkPad T550(20CK-K002QAU), T560-0FCD, ThinkPad T550(20CJ-JA027AU) Series ANTIEE PromiseEveryone of our replacement batteries has tested with