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Read about how Apple tests the performance of the iPhone battery.

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....

iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size. A10X Chip, the world’s most advanced Retina display, and more. Buy now at apple.com....