Original new a1382 battery for macbook pro 15 inch a1286 (only for early 2011, late 2011, mid 2012), fit mc721ll/a mc723ll/a 661-5844 020-7134-a battery type: li-polymer; capacity: 77.5wh; voltage: 10.95v grade a cells ensure fast charges and low power consumption; built-in circuit protection ensures both safety and stability. Replace for apple macbook pro 15.4″ a1286 (core i7 early 2011 late 2011 mid 2012 only) md103*/a md104*/a md318*/a md322*/a mc721*/a mc723*/a