Photos sent to 9to5Mac from a contributor show a capacity increase from 1430mAh to 1440mAh from the iPhone 4S, which in turn jumped from 1420 mAh in the iPhone 4.
The voltage of the battery will rise slightly from 3.7 to 3.8 if the battery images are correct and the watts-per-hour will increase by 0.15 from the current iPhone 4S to 5.45.
The Li-ion Polymer battery was assembled in China in June and, if correct, would mark the beginning of the iPhone manufacturing period.
A new, bigger battery would be required to support LTE network connectivity, Near Field Communication and a bigger screen that many believe will arrive in September’s iPhone. If the pictured batteries are legitimate, the slight increase probably will reignite Apple customers’ displeasure shown when Apple launched the iPhone 4S.
However, rumours of more energy-efficient dual-core chips and a new display on the iPhone utilising in-cell technology, could mean result in lower power consumption.