This is the Lithium Ion 38.8 Watt Hour Battery for the 12.9" iPad Pro models. This battery is classed as a grade 2 battery and therefore will have a full charge capacity between 75%-90%. When new these batteries have a full charge capacity of 10307mAh, therefore this battery will have between 5153mAh and 7730mAh.
Battery Specification
•3.77V
•38.8Whr
•10307mAh
•A1577
Condition : Grade-3
Grade 3 means that this battery has a full charge capacity of between 50% and 75% of its original quoted capacity.
Part Number(s) : 821-2720, 020-00015, 2217-2548 A1577
Warranty : 3months