Egoway Replacement Battery A1331 for MacBook 13 inch A1342 MC207LL/A MC516LL/A Battery type: rechargable Li-Polymer battery; Voltage: 10.95V; Capacity: 6000mAh/65Wh; 6 Cell. 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; CE-/FCC-/RoHS-Certified for safety. Operation time for standard batteries(eg, 4400mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. Warranty: 18 Months warranty, 30 days money return guarantee, 24 x 7 email support.