Tech Specs Compatible 7.55V 5263mAh, 38Wh Original Part Numbers A1527,A1534(EMC 2746),A1534(EMC 2991), A1534(EMC 3099),A1705 Suitable Models MacBook 12 inch Retina A1534(Early 2015),MacBook 12 inch Retina A1534(Early 2016),MacBook 12 inch Retina A1534(EMC 2746), MacBook 12 inch Retina A1534(EMC 2991),MacBook 12 inch Retina A1534(EMC 3099),MacBook 12 inch Retina A1534(Mid 2017), MacBook 12 inch Retina MF855LL/A,MacBook 12 inch Retina MF865LL/A, MacBook 12 inch Retina MLHA2LL/A, MacBook 12 inch Retina MLHC2LL/A, MacBook 12 inch Retina MNYF2LL/A, MacBook 12 inch Retina MNYG2LL/A, MacBook Air 12-inch Retina A1534 (Early 2016), MacBook Air 12" Retina A1534 (Early 2015), MacBook Core I5 1.3GHZ 12 inch Retina A1534(EMC 3099), MacBook Core I7 1.4GHZ 12 inch Retina A1534(EMC 3099), MacBook Core M 1.1GHZ 12 inch Retina A1534(EMC 2746), MacBook Core M 1.2GHZ 12 inch Retina A1534(EMC 2746), MacBook Core M 1.3GHZ 12 inch Retina A1534(EMC 2746), MacBook Core M3 1.1GHZ 12 inch Retina A1534(EMC 2991), MacBook Core M3 1.2GHZ 12 inch Retina A1534(EMC 3099), MacBook Core M5 1.2GHZ 12 inch Retina A1534(EMC 2991), MacBook Core M7 1.3GHZ 12 inch Retina A1534(EMC 2991), MF855, MF855C/A, MF855LL/A, MF865LL/A, MJY32, MJY32LL/A, MJY42LL/A, MK4M2, MK4M2LL/A, MK4N2LL/A, MLH72LL/A, MLH82LL/A, MLHA2LL/A, MLHC2LL/A, MLHE2LL/A, MLHF2LL/A, mmGL2LL/A, mmGM2LL/A, MNYF2LL/A, MNYG2LL/A* What's in the box 1 x Battery