SLODA Laptop Replacement Battery for Apple A1280 A1278, Macbook 13" New Alum Unibody MacBook Series(2008 Version), Li-Polymer, 10.8V, 4800mAh, 6 Cells Battery type: Li-ion; Capacity: 4800mAh/55Wh; Cells: 6-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. 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.