A2527 BATTERY SPECIFICATIONS: Capacity: 8700 mAh/99.6 Wh; Votage: 11.45 V, Battery Type: Li-Polymer. Package included:one OEM A2527 battery for 16 inch macbook pro A2485 one screwdrivers and one installation instructions XINGLT A2485 MACBOOK PRO REPLACEMENT BATTERY: New Upgraded 4.0, Japan Electric Core, Cobalt Proportion>98%,the higher the proportion of cobalt, the better the performance of the battery. UL-/CE-/FCC-/RoHS-Certified/PSE Report for safety