Replacement battery fits 27 Apple models, including Macbook. Specifications: 5500mAh, 11.54V, Li-Polymer. Compatible with: A2941, MQKP3LL/A, MQKQ3LL/A, MQKR3LL/A, MQKT3LL/A, MQKU3LL/A and 21 more compatible models. Replaces: Apple A2797. Apple replacement battery designed for Notebook/Laptop devices. Manufactured to exact OEM specifications.