The Apple iPhone 8 and iPhone 8 Plus come with smaller sized batteries than earlier generation iPhones, and the iPhone 8 Plus in particular comes with the smallest battery ever used in a Plus-sized iPhone. The information comes from a listing of the new iPhones with Chinese regulator TENAA.
Interestingly, Apple says officially that the iPhone 8 and 8 Plus will last as long as previous iPhones and this is likely due to the more efficient Apple A11 Bionic chip.
Here are the newly-revealed iPhone 8 and iPhone 8 Plus battery sizes:
So... what is the reason for those smaller battery sizes? Is it an attempt to make a thinner phone? Is it the new glass back and wireless charging that take up more space? We can only guess, but the reduced battery sizes are a fact.
Another curious detail that the listing confirms is the amount of RAM in the two new iPhones: 2GB of RAM in the iPhone 8 and 3GB of RAM in the iPhone 8 Plus.
This is far from the amount of RAM you get with most high-end Android phones that ship with 4GB or 6GB of the stuff, but keep in mind that Apple's iOS is a different architecture that is a little bit better in handling those resources.