Runpower New Laptop Battery for Apple A1280 A1278 (2008 Version) MacBook 13-Inch Series Aluminum Unibody[Li-Polymer] Battery type: Li-Polymer; Capacity: 54Wh/5000mAh; Cells: 6-cell; Voltage: 10.8V Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability About 500 recharge cycles over the life of the battery. Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety Operation time: Around 3 hours, the actual operation time will depend on how much electricity is required by the device and how you use it Warranty: 12 months free warranty. 24 x 7 professional and efficient email support