Apple Leaks posted to the Web first photos of the battery and board the next generation iPhone. According to this source, the battery iPhone 4S / 5 (model number GB-510-0100 423 282) has the same capacity, but also uses other interfaces. As for the manufacturer, this ATL Dongguan Amperex Technology Limited. This company manufactured the batteries for the iPhone 3GS and iPhone 4, but now for the iPhone 4S / 5.
Judging by the photos below, the fee for next-generation iPhone is different from the fee for the iPhone 4. Since the dimensions of the battery have not changed, we can assume that the iPhone 4S / 5 will not differ greatly from the current model. However, judging from the back, then we can assume that this latest smartphone from Apple is a bit thinner than the iPhone 4.
It only remains to add that the battery voltage to the next generation iPhone is 3.7 V, and its capacity - 1430 mAh.
Source: AppleLeaks.org