Personal experience with IPAD 1, 4 years using it every day with full discharges every day more than 1,000 charge cycles. When new full battery lasted 9 hours a

Personal experience with IPAD 1, 4 years using it every day with full discharges every day more than 1,000 charge cycles. When new full battery lasted 9 hours after 4 years lasts 8 hours.