First iPhone 7 Plus teardown reveals 2675 mAh battery, flaunts the optical zoom system
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UPDATE 9/16: The unit tore down here is most likely a prototype, as the iFixit disassembly of the retail unit shows a 2900 mAh battery and different internal layout.

According to Apple, this is good for an hour more of battery life compared to the 6s Plus, but the bump seems to stem from hardware and software optimizations, rather than an increase in battery capacity compared to its predecessor.

Notice the difference in height?
Unfortunately, we can't really grasp if there are two speakers at the bottom, as Apple lists in its ports and connectors diagram for the new iPhones, but more detailed teardowns could be coming soon.

After all, in a few hours it will be Friday in Australia, and the first thorough examinations of the iPhone 7 innards shouldn't be far behind.
Things that are NOT allowed: