Degradation comparison

Capacity over charge cycles. The shaded area covers 80 per cent of all devices; the line is the median.

Across 600 iPhones measured so far, the median device still holds 94.0 % of its original capacity after 300 charge cycles. Capacity falls by roughly 1.78 % per 100 cycles, which puts the median device at 80 % after about 1,170 cycles — against the 1,000 cycles Apple rates these batteries for.