The Battery lists a capacity of 7.04 watt-hours, slightly larger in capacity than the equivalent Battery capacity listed for the iPhone 6s (6.61 watt-hours) and almost identical to the iPhone 6 (7.01 watt-hours). Voltage is **t visible on the Alleged iPhone 7 battery, so the exact charge capacity is **t yet available, but should be similar to the iPhone 6 battery.
Rumors suggest the iPhone 7 and 7 Plus will be thinner than existing iPhones, with Apple perhaps making room for the similarly-sized Battery by eliminating the headphone jack and cutting down on the extra space around the Lightning port.