Puredick&reg; New Laptop Battery for Apple A1331 A1342 Unibody MacBook, MacBook Air MC234LL/A MC233LL/A 13.3-Inch MacBook Pro MC375LL/A MC516LL/A MC207LL/A, also fits 661-5391 020-6580-A 020-6582-A - 18 Months Warranty [Li-Polymer 6-cell 5800mAh/63.5Wh] Battery type: Li-Polymer; Capacity: 5800mAh/63.5Wh; Cells: 6-cell; Voltage: 10.95V. 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. CE-/FCC-/RoHS certificated for safety,18 months warranty,professional technical support, efficient and always satisfied customer service 24 x 7 email support. Operation time:Same Battery life with Brand new original Apple battery. In reality, this will depend on the amount of electricity required by the device and how you use it