TPE New Replacement Laptop Battery for Apple Macbook Pro 15 inch A1321 A1286 (Mid 2009 Mid 2010 Version) P/N: 020-6380-A 020-6766-B 661-5211 661-5476 - 12 Months Warranty [Li-polymer 10.95V 6700mAh] Battery type: Li-Polymer; Capacity: 6700mAh/73Wh; Voltage: 10.95V. Use the keyboard shortcuts Ctrl+F or -F (Mac) to quickly crosscheck if your requested model is listed in the Fits Compatible Model List. CE/FCC/RoHS certified for product safety. 24/7 email support, 12-month hassle-free warranty. Grade A Cell ensures fast charging and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time for standard batteries(6-Cell, 4400mAh): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.