UL-/CE-/FCC-/RoHS-Certified for safety, About 500 recharge cycles over the life of the battery,(Life cycle: 3-5 years) Newest Premium Grade Cells: XINGLT MacBook Air laptop replacement battery ensure fast charges and low power consumption Built-in circuit protection ensures both safety and stability.EMC Applicable number: 2469/2559(see compatible models) 25 Months After sale (Normal capacity loss is not covered by the After sale) 30 days money return service and 24/7 Email customer support Up to 500 recharge cycles over the life of the battery. After Sale and OperationTime: consistent with the new original battery life, even more than the original battery.