US Compass OEM A1321 Battery for Apple Macbook Pro Unibody 15" Series Laptop (10.95V 73WH) Battery type: Li-Polymer; 10.95V-73WH Compatible Part Numbers:Apple MacBook Pro 15 inch A1321 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety.12 Months Replacement Warranty