Battery Models: A2389; Fully compatible with MacBook Air 13-inch A2337 (2020 M1) High Capacity: This battery features a full charge capacity of 55 Wh 4800 mAh, with a voltage of 11.4 V, providing reliable power for your MacBook Advanced Protection: Includes the safety system, providing reliable protection against overcharging, circuit overloads, short circuits, and temperature variations Superior Quality: The battery features the latest high-capacity cell technology and premium components for long running time Package Includes: Battery Pack; Installation Tools; Installation Instruction; Service Manual; Any questions, Were available to serve you at all times