Apple's yearly developer conference should see iOS 8, OS X 10.10, and likely some hardware.
Photos of iPhone 5 Battery in Rear Shell, Compared to iPhone 4S Battery
As previously seen, the iPhone 5 battery runs at 3.8 volts, potentially using new chemistry to boost capacity to 5.45 watt-hours from the 3.7-volt 5.30 watt-hour battery used in the iPhone 4S. The comparison photos show that the new battery is slightly taller than the iPhone 4S battery, and the thickness appears roughly the same despite the fact that the new iPhone is expected to be at least 15% thinner than the iPhone 4S.
Key differences between the iPhone 5 and the iPhone 4S battery:
1. The iPhone 5's battery is slightly less than a half an inch taller than the iPhone 4S. The thickness appears to be identical.
2. The iPhone 5 is 3.8V/5.45Whr while the iPhone 4S is 3.7V/5.3Whr.
3. The connector on the iPhone 5 is not only different, it is placed on the opposite side of the battery to accomodiate its new position within the iPhone.
iPhone 4S battery (left) compared to iPhone 5 battery (right)
Apple is expected to introduce the iPhone 5 at next week's media event that was officially announced today.