Battery Type: Li-Polymer; Voltage: 7.6V; Capacity: 39Wh/5200mAh Brand New from Manufacturer, High Quality Macbook Air A1370 (only for Mid 2011 version), A1465 (Mid 2012, Mid 2013, Early 2014, Early 2015 version) replacement battery Note: This battery can work on Macbook Air 11'' A1370 Mid 2011 version, It's not fit Macbook Air 11'' A1370 2010 Version Initial use: It is recommended to fully charged and discharged the battery at least three times to activate the cell activity What You Get:1 x laptop battery, 2 x free screwdrivers, 24 x 7 email support