Replacement Battery A2389 Specification: Capacity: 4800mAh /55Wh, Voltage:11.4V. Compatible with MacBook Air 13-Inch A2337 With performance protection chip and high Performance Electric Core: Circuit and temperature protection (6.2 BattPro safety system). With fast charges and low power consumption. Real High Capacity with Longer operating time Battery Life: At least 1500 recharge cycles counts over the life of the battery, No swollen or overheating phenomenon,Friendly safe to your laptop Laptop Type: Compatible with MacBook air 13 inch A2337 Year 2020. EMC Applicable number: 3598 (Please check the picture to get more details), Battery Model: A2389 battery Package: Battery; Necessary installation tools; Installation and After sale Manual