Full compatible with your original battery,brand new from Professional Manufacturer, CE RoHS certified,grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability Expected operation time: 1.5-3 hours. This may vary, depending on device type and the way it is used.Up to 500 recharge cycles over the life of the battery. We provide best prices possible on the highest quality products and the most popular brands. Please check if this battery is compatible with your computer before purchasing. More Part numbers of compatible batteries and Computers are listed as following Fits models: Replacement Battery for MacBook Air 13 inch A1377 A1369 (Late 2010 Mid 2011 Mid 2012 Mid 2013 Early 2014 Version),A1405,A1466, A1496, 020-7379-A, 020-8143-A,661-5731, 661-6055, MC503LL/A / MC503 / MC503ZP/A / MC503LZ/A / MC503LL/A / MC503E/A / MC503B/A / MC504LL/A / MC504 / MC965LL/A / MC966LL/A / MD231LL/A / MD232LL/A / MD760LL/A / MD761LL/A