Laptop Battery for Apple Macbook Pro 17" ,A1189, Ma458, Ma458*/a, Ma458g/a, Ma458j/aaluminum Body As Originali-polymer, 10.8v, 6300mah, 60wh Battery type: Li-Polymer; Capacity: 6600mAh/71Wh; Cells: 9-cell; Voltage: 10.8V. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 8-hr x 5-weekday call support, 24-month hassle-free warranty. Grade A cells ensure fast charges 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