Features: It can perfectly replace the old battery of your computer, and recover your computer's battery life to a new state. Use imported lithium battery cells from for LG/SANYO/SONY, etc, the actual battery capacity is up to 51WH. All products have gone through strict inspection of quality department before leaving factory, in compliance with multiple quality system certification. Convenient and safe to use. It has long service life, supplying up to 500 cycles of discharge. Come with screwdrivers, convenient for you to install and fix the new battery into your computer. Specification: Type of Battery: Li-ion Voltage: 7.4V Capacity: 51WH Product Type: Replacement Battery Part Number: A1405, 020-7379-A For IOS Part: 661-6055, 661-6639 Compatible Models: For MacBook Air 13inch Model A1369 Mid 2011 For Intel i5 1.7 GHz (Mid 2011) For Intel i7 1.8 GHz (Mid 2011) For MacBook Air 13inch Model A1466 Mid 2012 For Intel i5 1.8 GHz (Mid 2012) For Intel i7 2.0 GHz (Mid 2012) Package List: 1 x Battery 1 x Manual 2 x Screwdriver 1、It can perfectly replace the old battery of your computer, and recover your computer's battery life to a new state. 2、Use imported lithium battery cells from for LG/SANYO/SONY, etc, the actual battery capacity is up to 51WH. 3、All products have gone through strict inspection of quality department before leaving factory, in compliance with multiple quality system certification. Convenient and safe to use. 4、It has long service life, supplying up to 500 cycles of discharge. 5、Come with screwdrivers, convenient for you to install and fix the new battery into your computer.